what is double circulation? Explain with the help of flow chart.

Dear Student

During blood circulation in warm-blooded animals like mammals, the blood passes through the heart twice. Deoxygenated blood from different capillaries in the body except that from the lungs move to the heart through the vena cava, This blood is sent for oxygenation to the lungs from the heart through the pulmonary artery. The oxygenated blood is returned to the heart through the pulmonary vein. This oxygenated blood in the heart is then pumped to the rest of the body through the aorta. Since the blood is passed through the heart twice, it is known as double circulation.

Flow of blood in the human heart

• The right atrium then contracts and passes the de-oxygenated blood to the right ventricle, through an auriculo-ventricular aperture.

• Then the right ventricle contracts and passes the de-oxygenated blood into the two pulmonary arteries, which pumps it to the lungs where the blood becomes oxygenated. From the lungs, the pulmonary veins transport the oxygenated blood to the left atrium of the heart.

• Then the left atrium contracts and through the auriculo-ventricular aperture, the oxygenated blood enters the left ventricle.

• The blood passes to aorta from the left ventricle. The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body.

Regards