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systemic circulation, which serves the body as a whole except for the lungs, and the ..... click the link for more information. for distribution to and utilization by the various tissues of the body. this is accomplished both physically, by mastication in the mouth and churning of the stomach, and chemically
pepsin; and an enzyme, gastric lipase, which begins the breakdown of fats. the gastric juices of young children contain, in addition to those just mentioned, the enzyme rennin, which acts on milk. some foods, including simple sugars and alcohol, are absorbed directly through the stomach wall and do not...
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