EXCRETION

Excretion

Excretion is the process by which waste products of metabolism and other non-useful materials are eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life. In humans "urine" is carried out through the urethra and that is part of the excretory system.

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excretion

Noun

  1. The process of removing or ejecting material that has no further utility, especially from the body; the act of excreting.
  2. Something being excreted in that manner.


The above text is a snippet from Wiktionary: excretion
and as such is available under the Creative Commons Attribution/Share-Alike License.

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