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afterbirth the placenta and fetal membranes expelled from the uterus after the birth of a human or animal.
umbilical cord a tough, flexible cord that connects the navel of a fetus to the placenta of its mother and that supplies nourishment to, and removes wastes from, the fetus.
villus any hairlike process on certain mucous membranes of the body that absorb nutrients, secrete mucus, or exchange materials, as in the small intestine or the mammalian placenta. [1/2 definitions]