NEET Biology · Hard

Human Reproduction: Placental exchange MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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Placental exchangeHardQuestion 9196

Question

Which statement is correct about maternal and foetal blood in placenta?

  1. A
    They come close for exchange but do not normally mix directly
    Correct
  2. B
    They always mix completely in healthy placenta
  3. C
    Foetal blood stays only in uterus wall
  4. D
    Maternal blood flows through amnion

Correct answer

They come close for exchange but do not normally mix directly

Explanation

Exchange occurs across placental membranes while maternal and foetal blood usually remain separate.