Page 154 - Primary Six Notes

THE HEART

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v;

How the heart works;

Circulation of blood in the heart is supported by four main
vessels. These are;

Vena cava, pulmonary artery, pulmonary vein and aorta.

Vena cava: it receives blood with less oxygen called deoxy-

genated blood from all parts of the body to the heart.

 Blood is then pushed down from the right auricle, to the

right ventricle and then to the lungs via the pulmonary ar-

tery.

 Blood visits the lungs to pick oxygen and drop off carbon di-

oxide.