body, before again contracting.

Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle, or heartbeat, takes about 0.8 second to complete the cycle. Duration of the cardiac cycle is inversely proportional to the heart rate.

Description

There are two atrial and two ventricle chambers of the heart; they are paired as the left heart and the right heart--that

1.Previous
3.Next