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Ivan Pavlov Biography

Ivan Petrovich Pavlov (Russian: Ива́н Петро́вич Па́влов, IPA: [ɪˈvan pʲɪˈtrovʲɪtɕ ˈpavləf] ( listen); 26 September [O.S. 14 September] 1849 – 27 February 1936) was a Russian physiologist known primarily for his work in classical conditioning.

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Ivan Pavlov Quotes

Finally, as the digestive canal is a complex system, a series of separate chemical laboratories, I cut the connections between them in order to investigate the course of phenomena in each particular laboratory; thus I resolved the digestive canal into several separate parts.

Connections, Cutting, Order, Parts, Phenomena, Separate

Possibilities are like the wings of birds; they allow man to soar and to climb to the heavens. And facts are like the atmosphere against which those wings must beat, and without which the soaring bird will surely plummet back to earth.

Against, Beat, Bird, Man, Men, Wings

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.

Animal, Becomes, Brain, Moment, Science

Men are apt to be much more influenced by words than by the actual facts of the surrounding reality

Facts, Influenced, Men, Reality, Surrounding

Never think that you already know all. However highly you are appraised, always have the courage to say to yourself-I am ignorant.

Ignorance, Thinking, Ignorant, Say, Think

The gastric laboratory uses its protein ferment under an acid reaction.

Acid, Gastric, Reactions, Under, Use

While you are experimenting, do not remain content with the surface of things.

Surface, Experimenting, Content, Things, Remain

When the dog is repeatedly teased with the sight of objects inducing salivary secretion from a distance, the reaction of the salivary glands grows weaker and weaker and finally drops to zero.

Dog, Zero, Distance, Salivary, Teased

Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.

Air, Enable, Men, Science, Wing, Wings

Edible substances evoke the secretion of thick, concentrated saliva. Why? The answer, obviously, is that this enables the mass of food to pass smoothly through the tube leading from the mouth into the stomach.

Answers, Mouths, Obviously, Pass, Secretion, Substance

It has long been known for sure that the sight of tasty food makes a hungry man's mouth water; also lack of appetite has always been regarded as an undesirable phenomenon, from which one might conclude that appetite is essentially linked with the process of digestion.

Essentially, Long, Men, Phenomenon, Regarded, Sight

The digestive canal is in its task a complete chemical factory. The raw material passes through a long series of institutions in which it is subjected to certain mechanical and, mainly, chemical processing, and then, through innumerable side-streets, it is brought into the depot of the body. Aside from this basic series of institutions, along which the raw material moves, there is a series of lateral chemical manufactories, which prepare certain reagents for the appropriate processing of the raw material.

Aside, Digestive, Long, Moving, Science, Subjected

In the case of the stomach, however, the nerves of the glandular cells were always severed when constructing an artificially isolated pouch and this, naturally, affected the normal work of the stomach.

Cells, Naturally, Nerves, Normal, Severed

Our success was mainly due to the fact that we stimulated the nerves of animals that easily stood on their own feet and were not subjected to any painful stimulus either during or immediately before stimulation of their nerves.

Animal, Animals, Feet, Nerves, Stood, Success

As was to be expected, the discovery of the nervous apparatus of the salivary glands immediately impelled physiologists to seek a similar apparatus in other glands lying deeper in the digestive canal.

Adrenal Glands, Digestive, Discovery, Expected, Lying, Seek

Science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching.

Life, Men, Passion, Searching, Two, Work

Physiology has, at last, gained control over the nerves which stimulate the gastric glands and the pancreas.

Adrenal Glands, Gastric, Glands, Lasts, Nerves, Physiology

Do not become archivists of facts. Try to penetrate to the secret of their occurrence, persistently search for the laws which govern them.

Facts, Law, Penetrate, Persistently, Science, Secret

Learn, compare, collect the facts!

Collect, Compare, Facts, Learn

But man has still another powerful resource: natural science with its strictly objective methods.

Men, Natural, Objectivity, Powerful, Resource

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