Question 30
Reproduction in AnimalsThe barrier between maternal and foetal blood is the
- A.liver
- B.umbilical chord
- C.uterine wall
- D.placenta.
Show the answer and explanation
Answer: D (placenta.)
Explanation
In the placenta the mother's blood and the foetus's blood are separated by thin membranes. Food and oxygen pass across, but the two bloods never mix.