. A text-book of human physiology . Fig. 119.—Duodenum of the mouse, after Hochhaus and Quincke. The section has been treatedwith ammonium sulphide. The black granules represent absorbed iron. The animal hadeaten cheese impregnated with ? carniferrin containing three per cent Fe. (Carniferrin is aderivative of carnic acid obtained from meat extract, and contains botii phosphoric acid andiron.) given solution depends, first upon the degree of dissociation of its molecules, andsecondly upon the velocity of migration of the ions. This law applies also inabsori)tion; for the rates of absorption of


. A text-book of human physiology . Fig. 119.—Duodenum of the mouse, after Hochhaus and Quincke. The section has been treatedwith ammonium sulphide. The black granules represent absorbed iron. The animal hadeaten cheese impregnated with ? carniferrin containing three per cent Fe. (Carniferrin is aderivative of carnic acid obtained from meat extract, and contains botii phosphoric acid andiron.) given solution depends, first upon the degree of dissociation of its molecules, andsecondly upon the velocity of migration of the ions. This law applies also inabsori)tion; for the rates of absorption of salts are proportional to their ratesof diffusion. However, parallelism between diffusion and absorption is subjectto some limitations, which make other auxiliary hypotheses necessary and showonce more that the i)hysical factors are not sufficient to explain the behavior ofthe salts in the intestine. In order to follow the absorption of water and of substances soluble inwater more closely, a solution of methylene blue has been


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1