The Cardiac system

Created by: ChelseaLPMc
Created on: 20-05-20 10:24

Systole & diastole

These are 2 phases of the cardiac cycle and they occur as the heart beats pumping blood through-out the system. The systole occurs when the heart contracts. The diastole occurs when the heart relaxes after contraction.

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Atria contract

The atria begins at the contract and the blood pumps into the ventricles. The ventricles contract raising the pressure and the valves shut to prevent backflow

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diastole

diastole is when muscles in the heart relax and this allows for blood to flow into the atria or some ventricles as the valves aren't blocking the blood.

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Atrial systole

Both atria contract. Blood flows from the atria into the ventricles. Backflow of blood into the vein is prevented by closure of the valves in the veins

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Ventricular systole

Both ventricles contract. The atrio-ventricular valves are pushed shut by pressurised blood in the ventricles. Blood flows from the ventricles into the arteries

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Atrioventricular valves

These open and close causing pressure to change. As the remains open the atria contract and increase the pressure then as the ventricles begin to contract the pressure rises above the atria and the blood starts to flow upwards- blood can't flow back.

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Other cards in this set

Card 2

Front

Atria contract

Back

The atria begins at the contract and the blood pumps into the ventricles. The ventricles contract raising the pressure and the valves shut to prevent backflow

Card 3

Front

diastole

Back

Card 4

Front

Atrial systole

Back

Card 5

Front

Ventricular systole

Back

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The Cardiac system