Explain the process of double circulation …

DOUBLE CIRCULATION

- There are four chambers in the heart totally. when all the chambers are in a relaxed(joint diastole) the pulmonary vein brings in the oxygenated blood to the left atrium.Tje tricuspid and the bicuspid valves open to push the blood to the ventricle.

- Now the left atrium is filled oxygenated blood.When the left atrium contracts the Oxygenated blood is pushed to the left ventricle of the heart.At this point the ventricle will be in relaxed stage known as "ventricle diastole".The SA node creates impulses which is received by AV.

-when the ventricle contracts( ventricle systole) the blood moves to main artery known as the aorta.This blood is distributed to all body organs .

-The blood loses oxygen when it produces for all the organs ie, it has been deoygenated.the deoxygenated blood enters through the main vein termed as Vena Cava.It brings in deoxygenated blood to right atrium.when right atrium contracts the blood is pushed to the right ventricle.

-And when the right ventricle contracts the blood is pushed to the lungs through pulmonary artery.

- A circulatory system where the blood enters the heart twice in one complete cycle is called "double circulation".ex:- human beings.