placenta definition

  • noun:
    • A membranous vascular organ that develops in feminine mammals during maternity, lining the uterine wall surface and partly enveloping the fetus, that its attached because of the umbilical cable. Following delivery, the placenta is expelled.
    • An organ with comparable functions in a few nonmammalian creatures, including certain sharks and reptiles.
    • Botany The component in the ovary of a flowering plant to which the ovules tend to be affixed.
    • A vascular organ in mammals, except monotremes and marsupials, current only inside feminine during gestation. It provides meals and air from the mother into the foetus, and passes back waste. Its implanted in wall of this uterus and links towards the foetus through umbilical cable. It's expelled after beginning.
    • In flowering flowers, the the main ovary in which ovules develop; in non-flowering flowers where spores develop.
    • The vascular appendage which connects the fetus using the parent, and is cast-off in parturition with all the afterbirth.
    • The section of a pistil or fresh fruit that the ovules or seeds tend to be affixed.
    • In zoöl., anat., and medicine: The organ of attachment of a vertebrate embryo or fetus to the wall of the uterus or womb of the female.
    • In echinoderms, a-flat discoidal sea-urchin, as a sand-dollar or cake-urchin: found in a generic sense by Klein, 1734.
    • [capitalized] A genus of bivalve mollusks, now called Plaruna.
    • In botany, that part of the ovary of flowering plants which bears the ovules.
    • the vascular structure into the uterus on most animals providing air and nutritional elements for and transferring wastes from the establishing fetus
    • that the main ovary of a flowering plant in which the ovules form

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