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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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