Multiple choice

What is taken away by the mother's blood from the foetus through the placenta?

  1. Oxygen

  2. Water

  3. CO2

  4. Food

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The placenta facilitates bidirectional exchange between maternal and fetal blood. Oxygen and nutrients flow from mother to fetus, while waste products (primarily carbon dioxide) flow from fetus to mother for elimination. Option C is correct - the mother's blood removes CO2 waste from fetal circulation.