AP BIOLOGY

Detailed explanation-1: -Urea is the major nitrogenous waste product, making up some 80% of it. Urea is formed in the liver, and is excreted by the kidneys in the urine along with the other types of protein waste products.

Detailed explanation-2: -The bean-shaped kidneys filter waste products out of the bloodstream and dispose of them by creating urine. Urine is made of these waste products dissolved in water.

Detailed explanation-3: -The major nitrogenous compounds excreted by the vertebrate kidney are ammonia, urea and uric acid.

Detailed explanation-4: -Urea is a nitrogenous waste that is excreted in urine. Ammonia is converted into urea, which is less toxic and requires less water to remove from the body.

Detailed explanation-5: -Kidneys. The paired kidneys are often considered the main organs of excretion. The primary function of the kidneys is the elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine .