Which of these structures deliver(s) blood to the left atrium?
a. coronary sinus
b. superior vena cava
c. inferior vena cava
d. pulmonary veins
e. pulmonary arteries
Answer: D
Which of these structures deliver(s) blood to the left atrium?
a. coronary sinus
b. superior vena cava
c. inferior vena cava
d. pulmonary veins
e. pulmonary arteries