Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
In human female, the blastocyst
BiologyHuman ReproductionNEETNEET 2010 (Mains)
Options:
  • A forms placenta even before implantation
  • B gets implanted into uterus three days after ovulation
  • C gets nutrition from uterine endometrial secretion only after implantation
  • D gets implanted in endometrium by the trophoblast cells
Solution:
1040 Upvotes Verified Answer
The correct answer is: gets implanted in endometrium by the trophoblast cells
Implantation is the attachment of blastocyst to the uterine wall (endometrium). It occurs after 6-7 days of fertilization. During implantation, the trophoectoderm (trophoblast) comes in contact with the endometrium of the uterus and sinks into a pit formed in the endometrium and get completely burried in the endometrium. Trophoblast cells form specialized structures called villi, which help in absorption of nutrient materials.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.