the liquid waste product filtered from the blood by the kidneys, stored in the bladder, and expelled from the body by the act of urinating
Urine is the liquid that you get rid of from your body when you go to the toilet. the yellow liquid waste that comes out of the body from the bladder (urina). Liquid solution of metabolic wastes and other, often toxic, substances filtered from plasma. The fluid in the Bowman capsule at the start of each nephron is essentially plasma without the large molecules (e.g., proteins). The concentrated fluid (final urine) that exits the kidney consists of water, urea, inorganic salts, uric acid, creatinine, ammonia, and broken-down blood pigments, including urochrome, which makes urine yellow, plus any unusual substances not reabsorbed into the blood. This is then excreted. See also hematuria; urinalysis; urinary system; urination
In mammals, a fluid excretion from the kidneys; in birds and reptiles, a solid or semisolid excretion