Abstract
Summary
1. Chemical measurements were made of the collagen content of the lungs, liver, kidneys, spleen, heart and skeletal muscle of 58 guinea pigs weighing between 60 and 1000 g. 2. The concentration of connective tissue components varied with different tissues; the lungs contained the greatest proportion, and the liver the least proportion, of collagen. 3. Tissues from older animals usually contained a higher per cent collagen than comparable younger tissues, except for the spleen where the converse was true. 4. The values obtained for guinea pig tissues were in essential agreement with previously reported figures for other species.
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