Anatomy: Animals Inside

Excretory System

What is the composition of human urine?

Human urine is composed mostly of water containing organic wastes, as well as some salts. The composition of urine can vary according to diet, time of day, and diseases— but overall, the makeup of urine is 95 percent water and 5 percent solids (such as urea, creatinine, uric acid, and trace amounts of such substances as enzymes, carbohydrates, and hormones).


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