ANATOMY

Detailed explanation-1: -The period of relaxation is called diastole in which the ventricle fills with blood and the period of ventricle contraction is called systole. Fig. 4.4 shows the cardiac cycle events for the left pump of the heart for two complete cycles. This figure illustrates the pressure–volume of the events.

Detailed explanation-2: -Diastole begins with the closing of the aortic valve (or pulmonic) and ends with the closing of the mitral valve (or tricuspid). This period encompasses the ventricular relaxation and filling. Diastole represents when the blood vessels return blood to the heart in preparation for the next ventricular contraction.

Detailed explanation-3: -The period of relaxation is called diastole. The period of contraction is called systole. Diastole is the longer of the two phases so that the heart can rest between contractions.

Detailed explanation-4: -Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase.

Detailed explanation-5: -Blood pressure is measured using two numbers: The first number, called systolic blood pressure, measures the pressure in your arteries when your heart beats. The second number, called diastolic blood pressure, measures the pressure in your arteries when your heart rests between beats.