The effect of sex and site on the composition of skin in the rat and mouse

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Abstract
The shaved skin of mature rats and mice of both sexes was divided into nose, ears, remainder of head skin, back, abdomen, tail and the remainder of the pelt, and the samples were analysed chemically,, The values for collagen, K and P varied considerably from one site to another. The entire dry fat-free skin of the female of both species contained higher concentrations of K and P than that of the male. In the female mouse, but not in the female rat, the concentration of collagen in the entire skin was lower than in the male. The sex differences in composition of the entire skin were not due to large differences in composition of skin from any particular site.