MICROANATOMY

Detailed explanation-1: -The cardiac cycle involves a complete contraction and relaxation of both the atria and ventricles and the cycle last approximately 0.8 seconds.

Detailed explanation-2: -The cardiac cycle has alternating phases of contraction, called systole, and relaxation or diastole. Based on a heart rate of 75 beats per minute, one cycle lasts about 800 milliseconds.

Detailed explanation-3: -The cardiac cycle comprises a complete relaxation and contraction of both the atria and ventricles, and lasts approximately 0.8 seconds.

Detailed explanation-4: -The heart beats 72 times per minute, i.e., that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds. During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood, which is called the stroke volume.