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Fetal Development and the Placenta

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Fetal Development and the Placenta
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Vocabulary

amniotic fluid

amniotic fluid

Fluid that allows the fetus to move freely; cushions the fetus and helps protect it from injury.
amniotic sac

amniotic sac

Enclosed membrane containing amniotic fluid that surrounds and protects a fetus.
implantation

implantation

Process in which a blastocyst embeds in the endometrium lining the uterus.
placenta

placenta

Temporary organ that consists of a large mass of maternal and fetal blood vessels; organ where the the mother’s and fetus’s blood exchange substances.
trophoblast

trophoblast

The outer cell layer of the blastocyst; develop into structures needed to support and nourish the embryo.
umbilical cord

umbilical cord

A tube that connects the fetus to the placenta; contains two arteries and a vein.

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