Question

how much do you know about your heart? find out by taking this
quiz: heart & circulatory system
q.5 the atria are the \upstairs\ chambers of the heart and these
parts are the \downstairs\ chambers:
a) valves
b) ventricles
c) blood
d) candy hearts

Explanation:

The heart has four chambers. The atria (upper chambers) receive blood, and the ventricles (lower chambers) pump blood out of the heart. Valves control blood flow, blood is the fluid being circulated, and candy hearts are unrelated to heart anatomy.

Answer:

B. Ventricles