Which valves are responsible for the sound of the heartbeat?
A. the atrioventricular and semilunar valves
B. the hydraulic and solenoid valves
C. the hypertension valves
D. the systole valves
Answer:A
Which valves are responsible for the sound of the heartbeat?
A. the atrioventricular and semilunar valves B. the hydraulic and solenoid valves C. the hypertension valves D. the systole valves
Explanation: Atrioventricular valves separate the lower and upper chambers of the heart, and semilunar valves are in the arteries leaving the heart. As the heart pumps, these valves open and close in turn. The sound of the heartbeat is caused by the closing in sequence.