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NEET 2010
Exam
NEET
Year
2010
Subject
Zoology
Chapter
Human Reproduction

NEET 2010 · Zoology · Human Reproduction

In human female, the blastocyst

In human female, the blastocyst

Options

  1. Aforms placenta even before implantation
  2. Bgets implanted into uterus three days after ovulation
  3. Cgets nutrition from uterine endometrial secretion only after implantation
  4. Dgets implanted in endometrium by the trophoblast cells

Correct answer

D. gets implanted in endometrium by the trophoblast cells

Step-by-step solution

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.
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