Question

Degree of proximity of the maternal and fetal blood circulations in the placenta of animals, in increasing order is :
(A) Hemochorial
(B) Epitheliochorial
(C) Synepitheliochorial
(D) Endotheliochorial
Choose the correct answer from the options given below:

• A. (A), (B), (D), (C).
• B. (B), (C), (D), (A).
• C. (C), (D), (A), (B).
• D. (B), (A), (D), (C).

Hint:

To remember the Grosser classification based on intact maternal layers (from least to most intimate):
- Epitheliochorial: Maternal epithelium intact (6 layers total).
- Synepitheliochorial: Maternal epithelium partially modified (5 layers total).
- Endotheliochorial: Maternal endothelium intact (4 layers total).
- Hemochorial: Fetal chorion directly in maternal blood (3 layers total).

Answer 1

The Correct Option is B