Bayliss, Sir William Maddock

Bayliss, Sir William Maddock

(bā`lĭs), 1860–1924, English physiologist. At University College, London, he investigated the mechanism of heart action, circulation, and digestion. With E. H. StarlingStarling, Ernest Henry,
1866–1927, English physiologist, b. India. He was professor (1899–1923) at University College, London. He was an authority on heart action and circulation. With Sir William M.
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 he discovered, in 1902, secretin, a hormone produced in the small intestine, and developed a theory of hormone action. He wrote Principles of General Physiology (1914) and The Vaso-Motor System (1923).
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