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This appendix, written upon the same lines as those found in the former editions of Foster's well known book of physiology, has been so enlarged that it now in reality constitutes a distinct treatise on the chemical substances occurring in the animal body; the volume is consequently paged separately from the rest of the text-book and it has an index of its own and it may be regarded as an independent work entirely. The chemical features of the more important of the various substances that occur in the body are briefly considered, such characters only being described as possess physiological interest. The chemistry of the several proteids is first taken up and then follows a section on the enzymes or soluble ferments, the more important of which, such as ptyalin, the amylolytic enzyme of the pancreas, pepsin, fibrin ferment, urea ferment and others are given a special description. The carbohydrates,
The Chemical Basis of the Animal Body. An Appendix to Foster's Text-Book of Physiology. (Sixth Edition.). JAMA. 1893;XX(2):54. doi:10.1001/jama.1893.02420290028010