Question

What happens during “Diastole”?

Answer 1

When the heart muscles relax and contract, they are referred to as diastole and systole. Blood pressure is determined by the equilibrium between diastole and systole. The heart is a pump that pumps oxygen-rich blood to all of the body's tissues and organs.

Complete answer:
The heart muscle relaxes and contracts, causing the heartbeat.
The period of relaxation is called diastole and the period of contraction is called systole.
The following qualities characterise diastole:
1. The cardiac muscle relaxes during diastole.
2. The chambers of the heart fill with blood when the heart relaxes, and a person's blood pressure drops.
The following qualities characterise systole:
The heart muscle contracts during systole. When the heart contracts, blood is pushed out of the heart and into the circulatory system's big blood vessels. The blood then travels to all of the body's organs and tissues. A person's blood pressure rises during systole.
At the same moment, arterial blood pressure falls to its lowest point (diastolic blood pressure), which in humans is usually around 80 mm of mercury. After the blood has been expelled (during ventricular systole) into the aorta and pulmonary artery, ventricular diastole occurs.
The term diastole refers to the moment when the ventricles are relaxed (not contracting). Blood flows passively from the left atrium (LA) and right atrium (RA) into the left ventricle (LV) and right ventricle (RV), respectively, for the majority of this time.

Note:-
Diastole is the period between aortic valve closure and mitral valve closure (diastole is considered to begin with the onset of relaxation of ventricular muscle contraction just prior to aortic valve closure), and it is divided into four phases: isovolumic relaxation, rapid filling, diastasis, and atrial systolic phases.