Question:
How many foetal membranes are formed during the development of human embryo?
How many foetal membranes are formed during the development of human embryo?
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Foetal membranes = Amnion + Chorion + Allantois + Yolk sac.
Updated On: Jul 18, 2026
- 3
- 4
- 2
- 1
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The Correct Option is B
Solution and Explanation
Step 1: Understanding foetal membranes.
Foetal membranes are extra-embryonic structures that support embryo development. They provide protection, nutrition, and waste removal functions.
Step 2: Types of foetal membranes.
The four foetal membranes are amnion, chorion, allantois, and yolk sac. Each has a specific role in development.
Step 3: Amnion function.
Amnion forms amniotic cavity filled with fluid that protects embryo from mechanical shock and dehydration.
Step 4: Chorion function.
Chorion helps in formation of placenta and facilitates exchange of gases and nutrients between mother and embryo.
Step 5: Allantois and yolk sac.
Allantois stores waste and helps in early blood formation, while yolk sac provides early nutrition in embryonic stage.
Step 6: Final conclusion.
Thus, four foetal membranes are formed during human embryonic development.
Foetal membranes are extra-embryonic structures that support embryo development. They provide protection, nutrition, and waste removal functions.
Step 2: Types of foetal membranes.
The four foetal membranes are amnion, chorion, allantois, and yolk sac. Each has a specific role in development.
Step 3: Amnion function.
Amnion forms amniotic cavity filled with fluid that protects embryo from mechanical shock and dehydration.
Step 4: Chorion function.
Chorion helps in formation of placenta and facilitates exchange of gases and nutrients between mother and embryo.
Step 5: Allantois and yolk sac.
Allantois stores waste and helps in early blood formation, while yolk sac provides early nutrition in embryonic stage.
Step 6: Final conclusion.
Thus, four foetal membranes are formed during human embryonic development.
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