Question

How are metabolic wastes, $C{O}_2$ and urea of a baby excreted during pregnancy?

• A. Metabolic wastes, CO₂ and urea, pass from embryo into the mother's blood, lungs and rectum.
• B. Metabolic wastes, CO₂ and urea, pass from embryo into the bag kind of structure present in mother's uterus.
• C. Metabolic wastes, CO₂ and urea, pass from embryo into the mother's excretory organs.
• D. Metabolic wastes, CO₂ and urea, pass from embryo into the mother's blood.

Answer 1

The correct option is D

Metabolic wastes, CO₂ and urea, pass from embryo into the mother's blood.

Nitrogenous wastes such as urea pass from foetal blood into maternal blood through placenta and are filtered out by the kidneys of the mother.