Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “Environmental extremists ... wouldn’t let you build a house unless it looked like a bird’s nest.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index O > Category: Organ

Organ Quotes (40 quotes)

...for the animals, which we resemble and which would be our equals if we did not have reason, do not reflect upon the actions or the passions of their external or internal senses, and do not know what is color, odor or sound, or if there is any differences between these objects, to which they are moved rather than moving themselves there. This comes about by the force of the impression that the different objects make on their organs and on their senses, for they cannot discern if it is more appropriate to go and drink or eat or do something else, and they do not eat or drink or do anything else except when the presence of objects or the animal imagination [l'imagination brutalle], necessitates them and transports them to their objects, without their knowing what they do, whether good or bad; which would happen to us just as to them if we were destitute of reason, for they have no enlightenment except what they must have to take their nourishment and to serve us for the uses to which God has destined them.
[Arguing the uniqueness of man by regarding animals to be merely automatons.].
Les Préludes de l'Harmonie Universelle (1634), 135-139. In Charles Coulston Gillespie (ed.), Dictionary of Scientific Biography (1974), Vol. 9, 318.
Science quotes on:  |  Action (57)  |  Animal (143)  |  Appropriate (7)  |  Automaton (4)  |  Color (9)  |  Destiny (12)  |  Difference (135)  |  Discerning (3)  |  Drink (15)  |  Eat (15)  |  Enlightenment (7)  |  Equal (22)  |  God (234)  |  Imagination (130)  |  Impression (32)  |  Mankind (111)  |  Necessity (78)  |  Nourishment (12)  |  Object (47)  |  Odor (5)  |  Passion (24)  |  Reason (173)  |  Resemblance (15)  |  Sense (104)  |  Serve (13)  |  Sound (21)  |  Transport (3)  |  Uniqueness (2)

I. Animals have an electricity peculiar to themselves to which the name animal electricity is given.
II. The organs in which animal electricity acts above all others, and by which it is distributed throughout the whole body, are the nerves, and the most important organ of secretion is the brain.
Thierische Elektricitäund Reizbarkeit. Ein Beytrag zu den neuesten Entdeckungen üdiese Gegenstä(1795), 329. Quoted and trans. in Edwin Clarke and C. D. O'Malley, The Human Brain and Spinal Cord (1968), 180.
Science quotes on:  |  Action (57)  |  Animal (143)  |  Body (88)  |  Brain (106)  |  Distribution (15)  |  Electricity (82)  |  Name (58)  |  Nerve (53)  |  Nomenclature (102)  |  Secretion (3)

A function to each organ, and each organ to its own function, is the law of all organization.
Social Statics: Or, The Conditions Essential to Human Happiness Specified, and the First of them Developed (1851), 274.
Science quotes on:  |  Function (41)  |  Law (273)  |  Organization (51)

A man in twenty-four hours converts as much as seven ounces of carbon into carbonic acid; a milch cow will convert seventy ounces, and a horse seventy-nine ounces, solely by the act of respiration. That is, the horse in twenty-four hours burns seventy-nine ounces of charcoal, or carbon, in his organs of respiration to supply his natural warmth in that time ..., not in a free state, but in a state of combination.
In A Course of Six Lectures on the Chemical History of a Candle (1861), 117.
Science quotes on:  |  Burning (13)  |  Carbon (28)  |  Carbon Dioxide (14)  |  Charcoal (5)  |  Combination (37)  |  Conversion (11)  |  Cow (18)  |  Horse (17)  |  Hour (13)  |  Man (258)  |  Ounce (2)  |  Respiration (10)  |  State (43)  |  Warmth (4)

A nutritive centre, anatomically considered, is merely a cell, the nucleus of which is the permanent source of successive broods of young cells, which from time to time fill the cavity of their parent, and carrying with them the cell wall of the parent, pass off in certain directions, and under various forms, according to the texture or organ of which their parent forms a part.
Anatomical and Pathological Observations (1845), 2.
Science quotes on:  |  Cell (90)

A physician is obligated to consider more than a diseased organ, more than even the whole man—he must view the man in his world.
Attributed by Rene Dubos, Man Adapting (1965, 1980), Chap. 12, 342. Dubos introduces the quote with “is reported to have taught” and no other citation.
Science quotes on:  |  Consideration (38)  |  Disease (170)  |  Man (258)  |  Obligation (7)  |  Physician (172)  |  View (48)  |  World (231)

All living organisms are but leaves on the same tree of life. The various functions of plants and animals and their specialized organs are manifestations of the same living matter. This adapts itself to different jobs and circumstances, but operates on the same basic principles. Muscle contraction is only one of these adaptations. In principle it would not matter whether we studied nerve, kidney or muscle to understand the basic principles of life. In practice, however, it matters a great deal.
'Muscle Research', Scientific American, 1949, 180 (6), 22.
Science quotes on:  |  Adaptation (23)  |  Animal (143)  |  Basic (18)  |  Circumstance (25)  |  Contraction (6)  |  Function (41)  |  Job (13)  |  Kidney (7)  |  Life (460)  |  Manifestation (21)  |  Matter (135)  |  Muscle (24)  |  Nerve (53)  |  Operation (53)  |  Organism (70)  |  Plant (96)  |  Principle (97)  |  Specialization (8)  |  Tree (88)  |  Understanding (231)

Among natural bodies some have, and some have not, life; and by life we mean the faculties of self-nourishment, self-growth and self-decay. Thus every natural body partaking of life may be regarded as an essential existence; ... but then it is an existence only in combination. ... And since the organism is such a combination, being possessed of life, it cannot be the Vital Principle. Therefore it follows that the Vital Principle most be an essence, as being the form of a natural body, holding life in potentiality; but essence is a reality (entetechie). The Vital Principle is the original reality of a natural body endowed with potential life ; this, however, is to be understood only of a body which may be organized. Thus the parts even of plants are organs, but they are organs that are altogether simple; as the leaf which is the covering of the pericarp, the pericarp of the fruit. If, then, there be any general formula for every kind of Vital Principle, it is—tthe primary reality of an organism.
Aristotle
In George Henry Lewes, Aristotle (1864), 231.
Science quotes on:  |  Body (88)  |  Life (460)  |  Organism (70)  |  Plant (96)

Analogue. A part or organ in one animal which has the same function as another part or organ in a different animal.
'Glossary', Lectures on the Comparative Anatomy and Physiology of the Invertebrate Animals Delivered at the Royal College of Surgeons in 1843 (1843), 374.
Science quotes on:  |  Analogue (3)  |  Animal (143)  |  Difference (135)  |  Function (41)  |  Nomenclature (102)  |  Part (55)

As an adult she had her organs removed one by one. Now she is a mere shell with symptoms where her organs used to be.
Written as an intern on one of his patient's charts; commentary on the result of surgical treatment of non-organic disease.
In Barry G. Firkin, Judith A. Whitworth, Dictionary of Medical Eponyms (1966), 267.
Science quotes on:  |  Surgery (29)  |  Symptom (7)

As an organ is exercised, circulation is more particularly directed to it and is more readily performed in it. Consequently, all its secretions and excretions increase. The more an organ is exercised, the more it is nourished.
'Réflexions sur les corps organisés et les sciences dont ils sont l'objet', Magasin Encyclopedique, III (1799), 471. Trans. Jonathan Mandelbaum in Pietro Corsi, The Age of Lamarck (1988), 75.
Science quotes on:  |  Blood (63)

Constant, or free, life is the third form of life; it belongs to the most highly organized animals. In it, life is not suspended in any circumstance, it unrolls along a constant course, apparently indifferent to the variations in the cosmic environment, or to the changes in the material conditions that surround the animal. Organs, apparatus, and tissues function in an apparently uniform manner, without their activity undergoing those considerable variations exhibited by animals with an oscillating life. This because in reality the internal environment that envelops the organs, the tissues, and the elements of the tissues does not change; the variations in the atmosphere stop there, so that it is true to say that physical conditions of the environment are constant in the higher animals; it is enveloped in an invariable medium, which acts as an atmosphere of its own in the constantly changing cosmic environment. It is an organism that has placed itself in a hot-house. Thus the perpetual changes in the cosmic environment do not touch it; it is not chained to them, it is free and independent.
Lectures on the Phenomena of Life Common to Animals and Plants (1878), trans. Hebbel E. Hoff, Roger Guillemin and Lucienne Guillemin (1974), 83.
Science quotes on:  |  Body (88)  |  Life (460)

Don’t take your organs to heaven with you. Heaven knows we need them here.
[Slogan advocating organ donations.]
Anonymous
Science quotes on:  |  Heaven (55)  |  Need (57)  |  Slogan (3)

First Law
In every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually strengthens, develops and enlarges that organ, and gives it a power proportional to the length of time it has been so used; while the permanent disuse of any organ imperceptibly weakens and deteriorates it, and progressively diminishes its functional capacity, until it finally disappears.
Philosophie Zoologique (1809), Vol. 1, 235, trans. Hugh Elliot (1914), 113.
Science quotes on:  |  Development (122)  |  Evolution (342)

Five per cent vision is better than no vision at all. Five per cent hearing is better than no hearing at all. Five per cent flight efficiency is better than no flight at all. It is thoroughly believable that every organ or apparatus that we actually see is the product of a smooth trajectory through animal space, a trajectory in which every intermediate stage assisted survival and reproduction.
[Rebutting the Creationist assertion that fully developed organs could not have arisen 'by chance.']
The Blind Watchmaker (1986, 1996) 90-91.
Science quotes on:  |  Creationist (10)  |  Evolution (342)  |  Flight (29)  |  Hearing (19)  |  Reproduction (34)  |  Survival (32)  |  Vision (21)

Fortunately Nature herself seems to have prepared for us the means of supplying that want which arises from the impossibility of making certain experiments on living bodies. The different classes of animals exhibit almost all the possible combinations of organs: we find them united, two and two, three and three, and in all proportions; while at the same time it may be said that there is no organ of which some class or some genus is not deprived. A careful examination of the effects which result from these unions and privations is therefore sufficient to enable us to form probable conclusions respecting the nature and use of each organ, or form of organ. In the same manner we may proceed to ascertain the use of the different parts of the same organ, and to discover those which are essential, and separate them from those which are only accessory. It is sufficient to trace the organ through all the classes which possess it, and to examine what parts constantly exist, and what change is produced in the respective functions of the organ, by the absence of those parts which are wanting in certain classes.
Letter to Jean Claude Mertrud. In Lectures on Comparative Anatomy (1802), Vol. I, xxiii--xxiv.
Science quotes on:  |  Animal (143)  |  Classification (56)

Homologue. The same organ in different animals under every variety of form and function.
'Glossary', Lectures on the Comparative Anatomy and Physiology of the Invertebrate Animals Delivered at the Royal College of Surgeons in 1843 (1843), 379.
Science quotes on:  |  Animal (143)  |  Difference (135)  |  Form (70)  |  Function (41)  |  Nomenclature (102)  |  Same (15)  |  Variation (34)

I know that certain minds would regard as audacious the idea of relating the laws which preside over the play of our organs to those laws which govern inanimate bodies; but, although novel, this truth is none the less incontestable. To hold that the phenomena of life are entirely distinct from the general phenomena of nature is to commit a grave error, it is to oppose the continued progress of science.
Leçons sur les Phenomenes Physiques de la Vie (1836-38), Vol. 1, 6. Trans. J. M. D. Olmsted, François Magendie (1944), 203.
Science quotes on:  |  Audacity (3)  |  Body (88)  |  Distinct (12)  |  Error (152)  |  Idea (226)  |  Inanimate (8)  |  Law (273)  |  Life (460)  |  Mind (272)  |  Nature (534)  |  Novelty (9)  |  Opposition (22)  |  Phenomenon (114)  |  Progress (200)  |  Regard (17)  |  Relationship (37)  |  Truth (450)

I think if a physician wrote on a death certificate that old age was the cause of death, he’d be thrown out of the union. There is always some final event, some failure of an organ, some last attack of pneumonia, that finishes off a life. No one dies of old age.
In talk, 'Origin of Death' (1970). Evolution began with one-celled organisms reproducing indefinitely by cell division.
Science quotes on:  |  Cause (122)  |  Certificate (2)  |  Death (183)  |  Failure (58)  |  Final (13)  |  Finish (11)  |  Life (460)  |  Old Age (17)  |  Physician (172)  |  Pneumonia (4)

I would clarify that by ‘animal’ I understand a being that has feeling and that is capable of exercising life functions through a principle called soul; that the soul uses the body's organs, which are true machines, by virtue of its being the principal cause of the action of each of the machine's parts; and that although the placement that these parts have with respect to one another does scarcely anything else through the soul's mediation than what it does in pure machines, the entire machine nonetheless needs to be activated and guided by the soul in the same way as an organ, which, although capable of rendering different sounds through the placement of the parts of which it is composed, nonetheless never does so except through the guidance of the organist.
'La Mechanique des Animaux', in Oeuvres Diverses de Physique et de Mechanique (1721), Vol. 1, 329. Quoted in Jacques Roger, Keith R. Benson (ed.), Robert Ellrich (trans.), The Life Sciences in Eighteenth-Century French Thought, (1997), 273-4.
Science quotes on:  |  Action (57)  |  Activation (4)  |  Animal (143)  |  Body (88)  |  Capability (27)  |  Cause (122)  |  Clarification (4)  |  Composition (30)  |  Difference (135)  |  Exercise (26)  |  Feeling (47)  |  Function (41)  |  Guidance (6)  |  Life (460)  |  Machine (56)  |  Mediation (3)  |  Part (55)  |  Principal (6)  |  Principle (97)  |  Soul (54)  |  Sound (21)  |  Understanding (231)  |  Virtue (27)

If we reflect that a small creature such as this is provided, not only with external members, but also with intestines and other organs, we have no reason to doubt that a like creature, even if a thousand million times smaller, may already be provided with all its external and internal organs... though they may be hidden from our eyes. For, if we consider the external and internal organs of animalcules which are so small that a thousand million of them together would amount to the size of a coarse grain of sand, it may well be, however incomprehensible and unsearchable it may seem to us, that an animalcule from the male seed of whatever members of the animal kingdom, contains within itself... all the limbs and organs which an animal has when it is born.
Letter to the Gentlemen of the Royal Society, 30 Mar 1685. In The Collected Letters of Antoni van Leeuwenhoek (1957), Vol. 5, 185.
Science quotes on:  |  Animal Kingdom (4)  |  Animalcule (8)  |  Creature (51)  |  Intestine (4)  |  Microorganism (19)  |  Reproduction (34)

It is in this mutual dependence of the functions and the aid which they reciprocally lend one another that are founded the laws which determine the relations of their organs and which possess a necessity equal to that of metaphysical or mathematical laws, since it is evident that the seemly harmony between organs which interact is a necessary condition of existence of the creature to which they belong and that if one of these functions were modified in a manner incompatible with the modifications of the others the creature could no longer continue to exist.
Leçons d' anatomie comparée, Vol. I, 47. Trans. William Coleman, Georges Cuvier Zoologist: A Study in the History of Evolution Theory (1964), 67-8.
Science quotes on:  |  Animal (143)  |  Law (273)

It is not the organs—that is, the character and form of the animal's bodily parts—that have given rise to its habits and particular structures. It is the habits and manner of life and the conditions in which its ancestors lived that have in the course of time fashioned its bodily form, its organs and qualities.
Attributed.
Science quotes on:  |  Ancestor (17)  |  Animal (143)  |  Body (88)  |  Environment (75)  |  Form (70)  |  Habit (42)  |  Structure (104)

It is probably no exaggeration to suppose that in order to improve such an organ as the eye at all, it must be improved in ten different ways at once. And the improbability of any complex organ being produced and brought to perfection in any such way is an improbability of the same kind and degree as that of producing a poem or a mathematical demonstration by throwing letters at random on a table.
[Expressing his reservations about Darwin's proposed evolution of the eye by natural selection.]
Opening address to the Belfast Natural History Society, as given in the 'Belfast Northern Whig,' (19 Nov 1866). As cited by Charles Darwin in The Variation of Animals & Plants Under Domestication (1868), 222.
Science quotes on:  |  Bring (7)  |  Complex (20)  |  Demonstration (29)  |  Eye (67)  |  Improbability (6)  |  Improve (9)  |  Letter (16)  |  Mathematics (367)  |  Perfection (43)  |  Poem (76)  |  Produce (6)  |  Random (11)  |  Throw (11)

Life is order, death is disorder. A fundamental law of Nature states that spontaneous chemical changes in the universe tend toward chaos. But life has, during milliards of years of evolution, seemingly contradicted this law. With the aid of energy derived from the sun it has built up the most complicated systems to be found in the universe—living organisms. Living matter is characterized by a high degree of chemical organisation on all levels, from the organs of large organisms to the smallest constituents of the cell. The beauty we experience when we enjoy the exquisite form of a flower or a bird is a reflection of a microscopic beauty in the architecture of molecules.
The Nobel Prize for Chemistry: Introductory Address'. Nobel Lectures: Chemistry 1981-1990 (1992), 69.
Science quotes on:  |  Aid (10)  |  Architecture (24)  |  Beauty (88)  |  Bird (57)  |  Build (23)  |  Cell (90)  |  Chaos (33)  |  Chemical Change (4)  |  Complicated (14)  |  Constituent (8)  |  Contradiction (22)  |  Disorder (8)  |  Energy (103)  |  Evolution (342)  |  Experience (132)  |  Flower (24)  |  Fundamental (59)  |  Law Of Nature (30)  |  Life (460)  |  Microscopic (3)  |  Molecule (82)  |  Order (60)  |  Organism (70)  |  Reflection (26)  |  Spontaneous (5)  |  Sun (115)  |  System (66)  |  Universe (291)

Nature ... tends to repeat the same organs in the same number and in the same relations, and varies to infinity only their form. In accordance with this principle I shall have to draw my conclusions, in the determining the bones of the fish's skull, not from a consideration of their form, but from a consideration of their connections.
'Considérations sur les pieces de la tête osseuse des animaux vertebras, et particulièrement sur celle du crane des oiseaux', Annales du Museum d'Histoire Naturelle, 1807, 10, 344. Trans. E. S. Russell, Form and Function (1916), 71.
Science quotes on:  |  Evolution (342)  |  Nature (534)

Nature, … in order to carry out the marvelous operations [that occur] in animals and plants has been pleased to construct their organized bodies with a very large number of machines, which are of necessity made up of extremely minute parts so shaped and situated as to form a marvelous organ, the structure and composition of which are usually invisible to the naked eye without the aid of a microscope. … Just as Nature deserves praise and admiration for making machines so small, so too the physician who observes them to the best of his ability is worthy of praise, not blame, for he must also correct and repair these machines as well as he can every time they get out of order.
'Reply to Doctor Sbaraglia in Opera Posthuma, 1697', in H. B. Adelmann (ed.), Marcello Malpighi and the Evolution of Embryology (1966), Vol. 1, 568.
Science quotes on:  |  Ability (37)  |  Admiration (23)  |  Aid (10)  |  Animal (143)  |  Blame (4)  |  Body (88)  |  Composition (30)  |  Construction (36)  |  Correction (20)  |  Extreme (17)  |  Formation (34)  |  Invisibility (5)  |  Machine (56)  |  Making (18)  |  Marvel (16)  |  Microscope (47)  |  Minuteness (3)  |  Naked Eye (4)  |  Nature (534)  |  Necessity (78)  |  Observation (264)  |  Operation (53)  |  Organization (51)  |  Out Of Order (2)  |  Part (55)  |  Physician (172)  |  Plant (96)  |  Pleasure (52)  |  Praise (9)  |  Repair (5)  |  Shape (20)  |  Small (35)  |  Structure (104)

One can truly say that the irresistible progress of natural science since the time of Galileo has made its first halt before the study of the higher parts of the brain, the organ of the most complicated relations of the animal to the external world. And it seems, and not without reason, that now is the really critical moment for natural science; for the brain, in its highest complexity—the human brain—which created and creates natural science, itself becomes the object of this science.
Natural Science and Brain (1909), 120.
Science quotes on:  |  Animal (143)  |  Brain (106)  |  Complexity (51)  |  Complication (16)  |  Creation (129)  |  Critical (10)  |  External (18)  |  Galileo Galilei (64)  |  Halt (5)  |  Higher (18)  |  Human (168)  |  Irresistible (4)  |  Moment (21)  |  Natural Science (29)  |  Object (47)  |  Part (55)  |  Progress (200)  |  Reason (173)  |  Relation (35)  |  Study (157)  |  Time (170)  |  World (231)

Organs, faculties, powers, capacities, or whatever else we call them; grow by use and diminish from disuse, it is inferred that they will continue to do so. And if this inference is unquestionable, then is the one above deduced from it—that humanity must in the end become completely adapted to its conditions—unquestionable also. Progress, therefore, is not an accident, but a necessity.
Social Statics: Or, The Conditions Essential to Human Happiness Specified, and the First of them Developed (1851), 65.
Science quotes on:  |  Accident (25)  |  Adaptation (23)  |  Capacity (15)  |  Condition (68)  |  Deduction (39)  |  Diminution (4)  |  Faculty (21)  |  Growth (70)  |  Humanity (46)  |  Inference (16)  |  Necessity (78)  |  Power (103)  |  Progress (200)  |  Unquestionable (4)  |  Use (54)

Second Law
All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, and hence through the influence of the predominant use or permanent disuse of any organ; all these are preserved by reproduction to the new individuals which arise, provided that the acquired modifications are common to both sexes, or at least to the individuals which produce the young.
Philosophie Zoologique (1809), Vol. 1, 235, trans. Hugh Elliot (1914), 113.
Science quotes on:  |  Environment (75)  |  Evolution (342)  |  Modification (22)  |  Reproduction (34)

The cell was the first invention of the animal kingdom, and all higher animals are and must be cellular in structure. Our tissues were formed ages on ages ago; they have all persisted. Most of our organs are as old as worms. All these are very old, older than the mountains.
In The Whence and Whither of Man; a Brief History of his Origin and Development through Conformity to Environment; being the Morse Lectures of 1895. (1896), 173. The Morse lectureship was founded by Prof. Samuel F.B. Morse in 1865 at Union Theological Seminary, the lectures to deal with “the relation of the Bible to any of the sciences.”
Science quotes on:  |  Age (60)  |  Animal Kingdom (4)  |  Cell (90)  |  First (42)  |  Invention (174)  |  Mountain (66)  |  Old (23)  |  Persist (5)  |  Structure (104)  |  Tissue (15)  |  Worm (12)

The development of the Vertebrate proceeds from an axis upward, in two layers, which coalesce at the edges, and also downward, in two layers, which likewise coalesce at the edges. Thus two main tubes are formed, one above the other. During the formation of these, the embryo separates into strata, so that the two main tubes are composed of subordinate tubes which enclose each other as fundamental organs, and are capable of developing into all the organs.
As translated and quoted in Ernst Haeckel and E. Ray Lankester (trans.) as epigraph for Chap. 10, The History of Creation (1886), Vol. 1, 244. Alternate translation: “Vertebrate development consists in the formation, in the median plane, of four leaflets two of which are above the axis and two below. During this evolution the germ subdivides in layers, and this has the effect of dividing the primordial tubes into secondary masses. The latter, included in the other masses, are the fundamental organs with the faculty of forming all the other organs.” in François Jacob, The Logic of Life (1993), 121-122.
Science quotes on:  |  Embryo (15)  |  Vertebrate (11)

The fact remains that, if the supply of energy failed, modern civilization would come to an end as abruptly as does the music of an organ deprived of wind.
Matter and Energy (1911), 251.
Science quotes on:  |  Abrupt (2)  |  Civilization (90)  |  Deprivation (4)  |  End (51)  |  Energy (103)  |  Energy Conservation (3)  |  Failure (58)  |  Future (110)  |  Modern (44)  |  Music (26)  |  Problem (180)  |  Supply (15)  |  Wind (28)

The next care to be taken, in respect of the Senses, is a supplying of their infirmities with Instruments, and, as it were, the adding of artificial Organs to the natural; this in one of them has been of late years accomplisht with prodigious benefit to all sorts of useful knowledge, by the invention of Optical Glasses. By the means of Telescopes, there is nothing so far distant but may be represented to our view; and by the help of Microscopes, there is nothing so small, as to escape our inquiry; hence there is a new visible World discovered to the understanding. By this means the Heavens are open'd, and a vast number of new Stars, and new Motions, and new Productions appear in them, to which all the ancient Astronomers were utterly Strangers. By this the Earth it self, which lyes so neer us, under our feet, shews quite a new thing to us, and in every little particle of its matter, we now behold almost as great a variety of creatures as we were able before to reckon up on the whole Universe it self.
Micrographia, or some Physiological Descriptions of Minute Bodies made by Magnifying Glasses with Observations and Inquiries thereupon (1665), preface, sig. A2V.
Science quotes on:  |  Astronomer (28)  |  Instrument (40)  |  Knowledge (679)  |  Microscope (47)  |  Sense (104)  |  Star (132)  |  Telescope (44)

The specific character of the greater part of the toxins which are known to us (I need only instance such toxins as those of tetanus and diphtheria) would suggest that the substances produced for effecting the correlation of organs within the body, through the intermediation of the blood stream, might also belong to this class, since here also specificity of action must be a distinguishing characteristic. These chemical messengers, however, or 'hormones' (from όρμάω, I excite or arouse), as we might call them, have to be carried from the organ where they are produced to the organ which they affect by means of the blood stream and the continually recurring physiological needs of the organism must determine their repeated production and circulation through the body.
'The Chemical Correlation of the Functions of the Body', The Lancet (1905), ii, 340.
Science quotes on:  |  Arouse (4)  |  Blood (63)  |  Characteristic (36)  |  Chemical (38)  |  Circulation (12)  |  Correlation (5)  |  Diphtheria (2)  |  Hormone (5)  |  Knowledge (679)  |  Messenger (2)  |  Need (57)  |  Physiology (41)  |  Production (72)  |  Toxin (4)

There are those who say that the human kidney was created to keep the blood pure, or more precisely, to keep our internal environment in an ideal balanced state. This I must deny. I grant that the human kidney is a marvelous organ, but I cannot grant that it was purposefully designed to excrete urine or to regulate the composition of the blood or to subserve the physiological welfare of Homo sapiens in any sense. Rather I contend that the human kidney manufactures the kind of urine that it does, and it maintains the blood in the composition which that fluid has, because this kidney has a certain functional architecture; and it owes that architecture not to design or foresight or to any plan, but to the fact that the earth is an unstable sphere with a fragile crust, to the geologic revolutions that for six hundred million years have raised and lowered continents and seas, to the predacious enemies, and heat and cold, and storms and droughts; to the unending succession of vicissitudes that have driven the mutant vertebrates from sea into fresh water, into desiccated swamps, out upon the dry land, from one habitation to another, perpetually in search of the free and independent life, perpetually failing, for one reason or another, to find it.
From Fish to Philosopher (1953), 210-1.
Science quotes on:  |  Architecture (24)  |  Balance (24)  |  Blood (63)  |  Cold (24)  |  Composition (30)  |  Contention (7)  |  Continent (22)  |  Creation (129)  |  Crust (10)  |  Denial (3)  |  Design (37)  |  Drought (6)  |  Dry (8)  |  Earth (250)  |  Enemy (26)  |  Environment (75)  |  Excretion (3)  |  Fact (325)  |  Failure (58)  |  Fluid (6)  |  Foresight (3)  |  Free (13)  |  Fresh (8)  |  Function (41)  |  Geology (145)  |  Grant (8)  |  Heat (48)  |  Homo Sapiens (11)  |  Human (168)  |  Ideal (26)  |  Independent (16)  |  Internal (6)  |  Keep (9)  |  Kidney (7)  |  Land (27)  |  Life (460)  |  Lowering (2)  |  Maintenance (7)  |  Manufacturing (16)  |  Marvel (16)  |  Perpetual (3)  |  Physiology (41)  |  Plan (40)  |  Predator (3)  |  Purity (8)  |  Purpose (66)  |  Raise (6)  |  Reason (173)  |  Regulation (13)  |  Revolution (34)  |  French Saying (51)  |  Sea (57)  |  Search (40)  |  Sense (104)  |  Serve (13)  |  Sphere (12)  |  State (43)  |  Storm (13)  |  Succession (30)  |  Swamp (2)  |  Unstable (4)  |  Vertebrate (11)  |  Vicissitude (3)  |  Water (122)  |  Welfare (9)

This integrative action in virtue of which the nervous system unifies from separate organs an animal possessing solidarity, an individual, is the problem before us.
The Integrative Action of the Nervous System (1906), 2.
Science quotes on:  |  Action (57)  |  Animal (143)  |  Individual (59)  |  Integration (11)  |  Nervous System (7)  |  Possession (24)  |  Problem (180)  |  Separate (9)  |  Unification (5)  |  Virtue (27)

Thus it might be said, that the vegetable is only the sketch, nor rather the ground-work of the animal; that for the formation of the latter, it has only been requisite to clothe the former with an apparatus of external organs, by which it might be connected with external objects.
From hence it follows, that the functions of the animal are of two very different classes. By the one (which is composed of an habitual succession of assimilation and excretion) it lives within itself, transforms into its proper substance the particles of other bodies, and afterwards rejects them when they are become heterogeneous to its nature. By the other, it lives externally, is the inhabitant of the world, and not as the vegetable of a spot only; it feels, it perceives, it reflects on its sensations, it moves according to their influence, and frequently is enabled to communicate by its voice its desires, and its fears, its pleasures, and its pains.
The aggregate of the functions of the first order, I shall name the organic life, because all organized beings, whether animal or vegetable, enjoy it more or less, because organic texture is the sole condition necessary to its existence. The sum of the functions of the second class, because it is exclusively the property of the animal, I shall denominate the animal life.
Physiological Researches on Life and Death (1815), trans. P. Gold, 22-3.
Science quotes on:  |  Animal (143)  |  Life (460)  |  Pain (49)  |  Plant (96)  |  Sense (104)

We know that nature invariably uses the same materials in its operations. Its ingeniousness is displayed only in the variation of form. Indeed, as if nature had voluntarily confined itself to using only a few basic units, we observe that it generally causes the same elements to reappear, in the same number, in the same circumstances, and in the same relationships to one another. If an organ happens to grow in an unusual manner, it exerts a considerable influence on adjacent parts, which as a result fail to reach their standard degree of development.
'Considérations sur les pieces de la tête osseuse des animaux vertebras, et particulièrement sur celle du crane des oiseaux', Annales du Museum d'Histoire Naturelle, 1807, 10, 343. Trans. J. Mandelbaum. Quoted in Pietro Corsi, The Age of Lamarck (1988), 232.
Science quotes on:  |  Evolution (342)  |  Nature (534)

Why it is that animals, instead of developing in a simple and straightforward way, undergo in the course of their growth a series of complicated changes, during which they often acquire organs which have no function, and which, after remaining visible for a short time, disappear without leaving a trace ... To the Darwinian, the explanation of such facts is obvious. The stage when the tadpole breathes by gills is a repetition of the stage when the ancestors of the frog had not advanced in the scale of development beyond a fish.
In The Works of Francis Maitland Balfour (1885), Vol. 1, 702.
Science quotes on:  |  Acquisition (21)  |  Advance (52)  |  Ancestor (17)  |  Animal (143)  |  Breathe (9)  |  Change (133)  |  Complication (16)  |  Charles Darwin (216)  |  Development (122)  |  Disappearance (15)  |  Explanation (88)  |  Fact (325)  |  Fish (33)  |  Frog (24)  |  Function (41)  |  Growth (70)  |  Leaving (4)  |  Obvious (24)  |  Remain (18)  |  Repetition (18)  |  Series (18)  |  Simplicity (92)  |  Stage (15)  |  Trace (10)  |  Undergo (4)  |  Visibility (6)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by:Albert EinsteinIsaac NewtonLord KelvinCharles DarwinSrinivasa RamanujanCarl SaganFlorence NightingaleThomas EdisonAristotleMarie CurieBenjamin FranklinWinston ChurchillGalileo GalileiSigmund FreudRobert BunsenLouis PasteurTheodore RooseveltAbraham LincolnRonald ReaganLeonardo DaVinciMichio KakuKarl PopperJohann GoetheRobert OppenheimerCharles Kettering  ... (more people)

Quotations about:Atomic  BombBiologyChemistryDeforestationEngineeringAnatomyAstronomyBacteriaBiochemistryBotanyConservationDinosaurEnvironmentFractalGeneticsGeologyHistory of ScienceInventionJupiterKnowledgeLoveMathematicsMeasurementMedicineNatural ResourceOrganic ChemistryPhysicsPhysicianQuantum TheoryResearchScience and ArtTeacherTechnologyUniverseVolcanoVirusWind PowerWomen ScientistsX-RaysYouthZoology  ... (more topics)
Sitewide search within all Today In Science History pages:
Custom Quotations Search - custom search within only our quotations pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Author Icon
who invites your feedback

Today in Science History

Most Popular

Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.
- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton