Question

Why do veins also have valves?
A.to keep the blood from circulating too fast
B.to regulate contractions of the heart
C. to keep the veins from losing blood
D.to prevent gravity from pulling the blood towards the feet

Answer 1

Answer:

(D) to prevent gravity from pulling the blood towards the feet

Answer 2

The answer is D as the blood would become stationary if it weren’t for valves