2.Human Reproduction
normal

Type of placenta in the human is

A

Chorionic, discoidal, epitheliochorial, deciduate

B

Deciduate, hemochorial, diffuse, allantochorionic

C

Hemochorial, metadiscoidal, deciduate, chorionic

D

Non-deciduate, discoidal, chorionic, hemoendothelial

Solution

Haemochorial placenta has only three barriers. Maternal part of placenta is completely absent. It occurs in
humans, apes, lemurs.
Metadiscoidal – Diffuse first, then discoidal.
Deciduate – $A$ portion of uterine tissue is detached and passed out at birth.
Chorionic – Formed by chorionic villi

Standard 12
Biology

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