what is plancenta ? how does it helps in growth of foetus?
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plancenta onwhich ovules grow.
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Ahoy matey *-*
here's your answer....
placenta is the tissue formed by the cells from the embryo and mother. It is formed at around 12 weeks of pregnancy and bcomes an important structure for nourishment of the embryo. Under normal conditions there is no direct flow of blood from mother to the young. The blood systems of the two are separated by this membranes made up of cells that allow an exchange mainly by diffusion, of O2, CO2, nutrient and waste material................
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