MICROANATOMY

Detailed explanation-1: -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-2: -Diastole is defined by the following characteristics: 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-3: -Atrial diastole: lasting about 0.7 seconds-relaxation of the atria, during which the atria fill with blood from the large veins (the vena cavae). Ventricular diastole: lasts about 0.5 seconds-begins before atrial systole, allowing the ventricles to fill passively with blood from the atria.

Detailed explanation-4: -Systolic pressure is the maximum pressure and occurs with ejection of blood from the heart (systole). Diastolic pressure is the minimum pressure and occurs when the heart is at rest (diastole).

Detailed explanation-5: -Each cardiac cycle has a diastolic phase (also called diastole) where the heart chamber is in a state of relaxation and fills with blood that receives from the veins and a systolic phase (also called systole) where the heart chambers are contracting and pumps the blood towards the periphery via the arteries.