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Urine (from Latin Urina, ae, f.) is a liquid by-product of the body secreted by the kidneys through a process called urination (or micturition) and excreted through the urethra.

Cellular metabolism generates numerous by-products, many rich in nitrogen, that require clearance from the bloodstream. These by-products are eventually expelled from the body during urination, the primary method for excreting water-soluble chemicals from the body. These chemicals can be detected and analyzed by urinalysis.

Human urine together with human feces are collectively referred to as human waste or human excreta.
Sample of human urine

Urine sections
Intro  Physiology  Characteristics  Examination for medical purposes   Uses   History   Society and culture   See also  References  External links  

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