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Identify the human developmental stage related to the site of its occurrence in a human
Option: 1
Morula a.middle part of fallopian tube
Option: 2
Blastula b.end part of Fallopian tube
Option: 3
Blastocyst c.uterine wall
Option: 4
8-celled morula d.starting point of fallopian tube
Answers (1)
As we have already discussed in Implantation -
- Implantation is the attachment of the blastocyst to the wall of the uterus of the mother.
- It occurs about a week after fertilization.
- The portion of the blastocyst where the inner cell mass is located lies against endometrium.
- At the point of contact, the trophoblastic cells digest and engulf the endometrial cells and thus, blastocyst sinks into a pit formed in the endometrium.
- Then the blastocyst is completely buried in the endometrium.
- The blastocyst forms villi by means of which it establishes an intimate contact with the uterine wall.
- The blastocyst derives nutrition and lives as a parasite within the uterus of the mother.
Hence, the correct option is (c).
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