The book A Manual of Physiology With Practical Exercises was written by author G N George Neil Stewart Here you can read free online of A Manual of Physiology With Practical Exercises book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Manual of Physiology With Practical Exercises a good or bad book?
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But it is only in recent years that it has become possible to illustrate this mutual relation by any large number of experimental facts. Certain of the substances taken in from the blood by the liver find their way, after undergoing various changes, into the biliary capillaries, and are excreted as bile ; certain other substances, such as sugar and the precursors of urea, are taken up by the hepatic cells, transformed and sometimes stored for a time within them, and then given out again to the ...blood. Bile we may call the external secretion of the liver, glycogen and urea constituents of its internal secretion. In one sense it is evident that all tissues, whether glands in the morphological sense or not, may be considered as manu- facturing an internal secretion. For everything that an organ absorbs from the blood and lymph it gives out to them again in some form or other except in so far as it METABOLISM, NUTRITION AND DIETETICS 483 forms or separates a secretion that passes away by special ducts.
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