Select all the statements that are true during the filling phase of the cardiac cycle.

O Isovolumetric contraction

O Ventricular Systole

O Atria pressure is greater than ventricular pressure

O Ventricular pressure is greater than aortic pressure

O Ventricles are contracting

O The AV valves are open

O All valves are closed

O Ventricular Diastole

O Aortic Valve is open

Atrial pressure is greater than ventricular pressure.

The av valves are open

Ventricular diastole

Explanation:

The filling phase occurs during diastole and it has four stages and they are;

Isovolumetric relaxation: this phase start when aortic valve and mitral valve are closed. It uses energy for it to relax.

Rapid filling: this occur when the atrial pressure is greater than ventricular pressure. The mitral valve open and allow blood to flow to left ventricle.

Slow filling: occurs when the left ventricular pressure approach atrial pressure, there by contributing to 5% diastolic volume.

Atrial systole: the left ventricular volume is delivered as the aorta contracts.