The Excretory System


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The Excretory System
10113011011302The Excretory SystemExcretion is the process by which an organism rids itself of metabolic wastes. In humans, such wastes may accumulate as urine, sweat, or tears. The elimination of feces (egestion, defecation) is not an excretory process, since fecal material was in the intestine but never within the body proper. (Since humans and other mammals are structured as a tube within a tube, the cavity of the digestive tract is really outside, although enclosed by, the body. The body proper runs from the inner lining of the digestive tract to the surface of the sk…
Citation
George H. Fried; George J. Hademenos: Schaum's Outline of Biology, Fourth Edition. The Excretory System, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export