Which Chamber of the Heart Does the Blood First Enter

Question

Which chamber of the heart does the blood first enter when it returns from the pulmonary circuit?
A) the left ventricle
B) the right ventricle
C) the right atrium
D) the left atrium

Accepted Answer

The blood first enters the left atrium when it returns from the pulmonary circuit, as this is where oxygenated blood from the lungs is received before being passed to the left ventricle.