Q.
In the given diagram find out, $A,B$ and $C$
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A) A-Plug of mucous in cervix, B-Placement villi, C-Umbilical cord
B) A-Umbilical cord, B-Placement villi, C- Plug of mucous in cervix
C) A-Umbilical cord, B- Plug of mucous in cervix, C- Placement villi
D) A-Placement villi, B- Plug of mucous in cervix, C-Umbilical cord
Explanation
After implantation, finger-like projections appear on the trophoblast called chorionic villi, which are surrounded by the uterine tissue and maternal blood. The chorionic villi and uterine tissue become interdigitated with each other and jointly form a structural and functional unit between developing embryo (foetus) and maternal body called placenta [image:3_image71.png]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.