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excretion
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excretion

In biology, the removal of the waste products of metabolism from living organisms. In plants and simple animals, waste products are removed by diffusion. Plants, for example, excrete O2, a product of photosynthesis. In mammals, waste products are removed by specialized excretory organs, principally the kidneys, which excrete urea. Water and metabolic wastes are also excreted in the faeces and, in humans, through the sweat glands in the skin; carbon dioxide and water are removed via the lungs. The liver excretes bile pigments.



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? Mentioned in ? References in periodicals archive
 
Polar conjugates of estrogens are common excretory products, and they are relatively inactive in vertebrates compared with unconjugated parent compounds.
Estrogens from sewage in coastal marine environments. (Research) by Tarrant, Ann M. / Environmental Health Perspectives
Natural or manipulative field studies might use captive populations in seminatural enclosures or excretory products collected (by use of metabolic chambers) from wild-caught animals in mark-recapture studies; the success of these studies will depend on the development of assays for infectious virus.
Long-term Studies of Hantavirus Reservoir Populations in the ... by Childs, James E. / Emerging Infectious Diseases
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