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Anatomy

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Embryology

Question
47 out of 50
 

Fetal side of placenta develops from (AIPG 2010)



A Chorionfrondosum

B Decidua basalis

C Chorionlaeve

D Amnion

Ans. A

Chorion frondosum

The greater part of the chorion is in contact with the decidua capsularis, and over this portion the villi, with their contained vessels, undergo atrophy, so that by the fourth month scarcely a trace of them is left, and hence this part of the chorion becomes smooth, and is named the chorion laeve; as it takes no share in the formation of the placenta, it is also named the non-placental part of the chorion.

 On the other hand, the villi on that part of the chorion which is in contact with the decidua placentalis increase greatly in size and complexity, and hence this part is named the chorionfrondosum.

Embryology Flashcard List

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