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प्रश्न
Answer the following question.
Name the embryonic stage that gets implanted in human females. Explain the process of implantation.
उत्तर
A blastocyst is an embryonic stage that gets implanted in the uterus of the female.
Implantation involves the attachment of the blastocysts to the uterine epithelium. The process of implantation begins at the end of week 1, it requires the newly hatched blastocyst loosely adhered to the endometrial epithelium layer within the uterus.
The blastocyst is arranged into an outer layer called the trophoblast and an inner cell mass. It is the trophoblast cells that proliferate rapidly and differentiate into an inner layer of cytotrophoblast and an outer multinucleated cell layer, the syncytiotrophoblast
The projections of cytotrophoblast and syncytiotrophoblast bring the embryo into the endometrium so that it will fully be covered by endometrium epithelium.
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संबंधित प्रश्न
Name the stages in a human female where Corpus luteum and placenta co-exist.
How is polyspermy prevented in humans?
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 |
Amount of yolk and its distribution are changed in the egg. Which one is affected?
The sex of the fetus will be decided at ______.
The finger-like projections that appear on the trophoblast following implantation, are called chorionic villi.
Blastomeres found in the outer layer of blastocyst are
What is the significance of ampullary–isthmic junction in the female reproductive tract?
Where does the first cleavage division of zygote take place?
The zygote passes through several developmental stages till implantation, Describe each stage briefly with suitable diagrams.
