alleryThe structural and functional unit between the developing foetus and maternal body that supports exchange of gases, nutrients and wastes is the:
AAmniotic sac
BPlacenta
CUmbilical cord alone
DYolk sac
Answer & Solution
Correct answer: B. Placenta
The **placenta** is formed by interdigitating chorionic villi (foetal) with uterine tissue (maternal).
It facilitates O₂/nutrient supply to the foetus and removal of CO₂/wastes, and is connected to the foetus via the umbilical cord.
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