Embryo, placenta and fetal membranes

Placenta at four and one-half months of gestation

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Image #164-7

	Embryo, placenta and fetal membranes Placenta at four and one-half months of gestation The umbilical arteries have been injected with red latex and the umbilical vein has been filled with blue latex. 1 . Placenta 2 . Amnion 3 . Chorion (left side) 4 . Cotyledon 5 . Umbilical vein (within umbilical cord) 6 . Umbilical arteries