Function of the heart- Unit 4

  • Created by: Jess_down
  • Created on: 22-09-19 15:27

What are the 5 main functions of the heart

Double pump
Cardiac cycle
Role of components

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Cardiac cycle

The cardiac cycle describes all the activities of the heart through one complete heartbreak
That is, one contraction and relaxation of both the artia and ventricles
A contraction is referred to as systole, and a relaxation is referred to as diastole

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Double pump

The heart is a single organ, but it function as double pump sending oxygen- depleted blood to the lungs to pick up oxygen and unload carbon dioxide while simultaneously sending oxygen-loaded blood coming from the the lungs to cells throughout the body

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Role of components

Right atrium- receives blood from the body via the cranial and caudal vena cava
Right ventricle- receives blood from the right atrium and limps it to the lungs for oxygenation
Pulmonary artery- carries blood from the right ventricle to the lungs. The pulmonary valve is between the ventricle and the artery
Pulmonary veins- receives oxygenated blood from the lungs into the left atrium
Left atrium- receives oxygenated blood from the pulmonary veins
Left ventricle- pumps the oxygenated blood into the aorta, which carries it to the body. The aortic valve separates these two
Aorta- carries oxygenated blood to the body

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Diastole is part of the cardiac cycle when the heart redials with blood following systole (contraction)
The balance between diastole and systole determines a persons blood pressure
The heart is a pump that supplies all tissues and organs of the body with oxygen rich blood. The heartbreak is caused by the heart muscles relaxing and contracting

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