GENERAL HISTOLOGY

Detailed explanation-1: -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 .

Detailed explanation-2: -The most common waste products are urea and creatinine, but there are many other substances that need to be eliminated. The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances into the bloodstream.

Detailed explanation-3: -Nitrogenous wastes are the byproduct of metabolic reactions and these are also called metabolic wastes. Urea is the major nitrogenous waste product and it is formed in the liver. Urea is secreted out by the kidney along with uric acid through urine.