Label this diagram illustrating the placement of the extra embryonic membranes, and give a funct

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Label this diagram illustrating the placement of the extra...

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Key Concepts

Chorion

The chorion is the outermost extraembryonic membrane that encloses all the other membranes. In humans, it plays a crucial role in forming the fetal part of the placenta, facilitating nutrient, gas, and waste exchange between the maternal and fetal blood supplies.

Allantois

The allantois is an outpouching that, in humans, contributes to the formation of the umbilical cord and the blood vessels within it. Although less prominent in human development compared to other species, it aids in early blood formation and waste storage before the placenta fully develops.

Amnion

The amnion is a membranous sac that surrounds the embryo, filled with amniotic fluid. This fluid cushions the developing embryo or fetus and provides a stable, shock-absorbent environment, protecting it from mechanical injury and temperature fluctuations during development.

Yolk Sac

The yolk sac is an extraembryonic membrane important in early embryonic development. In humans, it is involved in the initial formation of blood cells and provides early nutrients to the embryo until the placenta is fully functional.

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