THE HEART

THE HEART

FUNCTION OF THE HEART

Double pump = Blood enters the two atria simultaneously and once full, contract and push blood into the ventricles through the tricuspid and bicuspid valves

-          This blood leaves the heart through either the semi-lunar valves and the pulmonary vein and aorta

Diastolic rate = when the ventricles are relaxing and the atria are filling

Systolic rate = when the ventricles are contracting

The cardiac cycle = the co-ordinated flow of blood through the heart

-          Takes place on average 70 times a minute

FLOW OF BLOOD

-          Blood enters the two atria

-          The blood flows downwards into the two ventricles

-          As the ventricles contract, the blood is forced out of the heart

-          Left pumping out through the aorta then around the body

-          Right to the lungs to deposit carbon dioxide…