Gastrointestinal physiology is the branch of human physiology that addresses the physical function of the gastrointestinal (GI) tract. The function of the GI tract is to process ingested food by mechanical and chemical means, extract nutrients and excrete waste products. The GI tract is composed of the alimentary canal, that runs from the mouth to the anus, as well as the associated glands, chemicals, hormones, and enzymes that assist in digestion. The major processes that occur in the GI tract are: motility, secretion, regulation, digestion and circulation. The proper function and coordination of these processes are vital for maintaining good health by providing for the effective digestion and uptake of nutrients.[1][2]
^Trowers, Eugene; Tischler, Marc (2014-07-19). Gastrointestinal Physiology: A Clinical Approach. Springer. p. 9. ISBN 9783319071640.
^"Human Physiology/The gastrointestinal system - Wikibooks, open books for an open world". en.wikibooks.org. Retrieved 2016-09-05.
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