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प्रश्न
Define Placentation
उत्तर
Placentation: The temporary organ derived from two different individuals, the foetus and the mother. It comprises of a large number of finger-like outgrowths, the villi. This causes intimate connection between the foetal membrane and the uterine wall.
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संबंधित प्रश्न
Name the hormones secreted and write their functions by corpus luteum and placenta (any two).
Explain the process of fertilisation and implantation in humans.
Morula is a developmental stage ______.
If mammalian ovum fails to get fertilized, which one of the following is unlikely?
Match the following and choose the correct options:
| A. | Trophoblast | i. | Embedding of blastocyst in the endome |
| B. | Cleavage | ii. | Group of cells that would differentiate as embryo |
| C. | Inner cell mass | iii. | Outer layer of blastocyst attached to the endometrium |
| D. | Implantation | iv. | Mitonic division of zygote |
Cleavage starts after fertilization in ______.
In telolecithal egg, the yolk is found ______.
The solid mass of 8-16 cells formed from zygote after successive mitotic divisions is called ______.
The outermost layer of a blastocyst is called ______.
Where does the first cleavage division of zygote take place?
