This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...Plant foods are always associated to a greater or less extent with cellulose, while flesh foods are not. Cellulose digests with difficulty. It is hard to dissolve. The particles of vegetal starch, sugar, fat, and protein are enmeshed within this tissue of cellulose, and are thus rendered less accessible to the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...Plant foods are always associated to a greater or less extent with cellulose, while flesh foods are not. Cellulose digests with difficulty. It is hard to dissolve. The particles of vegetal starch, sugar, fat, and protein are enmeshed within this tissue of cellulose, and are thus rendered less accessible to the digestive chemicals than the flesh foods are. The resistance of cellulose to the digestive fluids is overcome by man through the use of fire, by artificial grinding, and the like. Cooking softens the cellulose, and causes the food granules to swell and burst the walls of the cells. Vegetal foods, through cooking, milling, artificial digestion, and other preliminary processes to which they are subjected by human specialists, are rendered more digestible even than flesh foods, and almost as assimilable. The testa of the bean, which consists largely of cellulose, and which is sometimes an objectionable feature of this valuable vegetable when the cooking is done by boiling, may be completely changed and rendered entirely innocuous by the higher temperatures of the baking oven. Unground grain may lie in the stomach of the fowl for sixteen hours or more before it is digested, but when made into meal and cooked will be digested in one-sixth or oneseventh of the time. But non-human races know nothing of the uses of fire. Hence, those species living on vegetal foods, and especially those that digest cellulose, require and have invariably larger and more elaborate digestive tracts than those living on flesh. The alimentary canal of flesh-eaters is short and simple, being in mammals commonly about four times the length of the body. The stomach is a single sac, excepting in those species, like the porpoise, which have acquired their characters as an inheritance f...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.