Multiple Choice
Which of the following structures is NOT formed by neural crest cells?
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28. Human Development
Embryonic Development (Weeks 3-8)
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Which structure of the amniotic egg most closely surrounds the embryo?
A
Amnion
B
Chorion
C
Yolk sac
D
Allantois
Verified step by step guidance1
Understand the function of each structure in the amniotic egg: The amnion, chorion, yolk sac, and allantois each have distinct roles in protecting and nourishing the embryo.
The amnion is a thin membrane that forms a fluid-filled sac around the embryo, providing a protective cushion and maintaining a stable environment.
The chorion is the outermost membrane that contributes to gas exchange and protection.
The yolk sac is involved in nutrient supply to the embryo, especially in the early stages of development.
The allantois is responsible for waste storage and also plays a role in gas exchange. Based on these functions, identify which structure is closest to the embryo.
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