Question

What happens during diastole?

Answer 1

Diastole:

1. It is the cardiac event whereby the ventricular part of a heart’s muscles relaxes and fills with blood.
2. The ventricles relax in early diastole and semilunar valves close.
3. The atrioventricular valves then open causing ventricles to get filled with blood. In the mid diastole, ventricles and atria are relaxed, while semilunar valves are closed.
4. The atrioventricular valves remain open while ventricles get filled with blood.
5. The SA node in late diastole transmits the electrical impulse to the atria causing it to contract while ventricles fill up with all the more blood.
6. The electrical signals then lead to contraction travel from the atria to the ventricles. It reaches the atrioventricular node before it does so.
7. The node then postpones the signal for ventricles to contract all at the same time instead of little at times.