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  • Which of the following is a characteristic of Chorio-allantoic placenta?Option: 1 Yolk sac remains undeveloped<

Which of the following is a characteristic of Chorio-allantoic placenta?

Option: 1

Yolk sac remains undeveloped


Option: 2

Chorion contains sinuses filled with maternal blood


Option: 3

Allantois makes fusion with the chorion


Option: 4

Found in human beings


Answers (1)

best_answer

In chorio-allantoic placenta, the yolk sac remains undeveloped, and the fusion found between the uterine wall and the embryo is lined by chorion and allantois. Since the
placenta is formed of chorion and allantois, it is termed as chorio-allantoic placenta. This type of placenta is found in Parameles and Dasyurus, not in human beings.

Option 1 is the correct answer. 

Posted by

Ritika Harsh

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