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