ANATOMY

Detailed explanation-1: -Diastole is when the heart muscle relaxes. When the heart relaxes, the chambers of the heart fill with blood, and a person’s blood pressure decreases.

Detailed explanation-2: -Diastole is the period of the cardiac cycle that encompasses ventricular relaxation, passive and active filling of blood into the heart, and the period just prior to ejection. At the cellular level, the interplay of calcium within the cardiac myocytes is crucial to ventricular relaxation.

Detailed explanation-3: -Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase.

Detailed explanation-4: -The cardiac cycle is essentially split into two phases, systole (the contraction phase) and diastole (the relaxation phase). Each of these is then further divided into an atrial and ventricular component.