Definitions for excretionɪkˈskri ʃən
This page provides all possible meanings and translations of the word excretion
elimination, evacuation, excretion, excreting, voiding(noun)
the bodily process of discharging waste matter
body waste, excretion, excreta, excrement, excretory product(noun)
waste matter (as urine or sweat but especially feces) discharged from the body
The process of removing or ejecting material that has no further utility, especially from the body; the act of excreting.
Something being excreted in that manner.
the act of excreting
that which is excreted; excrement
Origin: [Cf. F. excrtion.]
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. In single-celled organisms, waste products are discharged directly through the surface of the cell. In plants, breakdown of substances is much slower than in animals. Hence accumulation of waste is much slower and there are no special organs of excretion. Green plants in darkness or plants that do not contain chlorophyll produce carbon dioxide and water as respiratory waste products. Carbon dioxide released during respiration gets utilized during photosynthesis. Oxygen itself can be thought of as a waste product generated during photosynthesis, and exits through stomata, root cell walls, and other routes. Plants can get rid of excess water by transpiration and guttation. Waste products may be stored in leaves that fall off. Other waste materials that are exuded by some plants — resins, saps, latexes, etc. are forced from the interior of the plant by hydrostatic pressures inside the plant and by absorptive forces of plant cells. These processes do not need added energy, they act passively. Plants also excrete some waste substances into the soil around them.
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