AP BIOLOGY

Detailed explanation-1: -Water and salts are removed from the body through sweat. Whereas, urea is eliminated through kidney and carbon dioxide is eliminated through the lungs.

Detailed explanation-2: -Sweat is also known as perspiration (say: pur-spuh-RAY-shun), and it is made almost completely of water, with tiny amounts of other chemicals like ammonia (say: uh-MOWN-yuh), urea (say: yoo-REE-uh), salts, and sugar. (Ammonia and urea are left over when your body breaks down protein.)

Detailed explanation-3: -In humans, urea is excreted in sweat, largely through the eccrine sweat gland. The urea concentration in human sweat is elevated when compared to blood urea nitrogen.

Detailed explanation-4: -Sweat is a liquid made from 99% water and 1% salt and fat.

Detailed explanation-5: -human volunteers show that urea is sequestered in the epidermis. where it turns over more slowly than in general body water. Sequestered urea, presumed to be concentrated through insensible evaporation of water, is the source of the excess urea found in sweat.