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  • Identify the human developmental stage related to the site of its occurrence in a human Option: 1 Morula           &nbs

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)

best_answer

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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mansi

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