The blood circulation in the circulatory system

The blood circulation

The blood circulation

The human circulatory system

The blood circulation is the path of the blood throughout the body . It can be divided into two small circulations which are the minor ( pulmonary ) blood circulation , and the major ( systemic ) blood circulation .

The minor ( pulmonary ) blood circulation is the blood circulation between the heart and the two lungs , The major ( systemic ) blood circulation is the blood circulation between the heart and all the parts of the body .

The blood circulation

The arteries and the veins in the human body .

The blood carrying carbon dioxide gas reaches from all the body parts to the right atrium through the  two large veins which are the superior and the inferior venae cavae .

The blood flows to the right ventricle through a valve , The right ventricle contracts pumping the blood into the two lungs through the pulmonary artery , Inside the two lungs , carbon dioxide gas is exchanged with oxygen gas .

The blood rich in oxygen ( which comes from the two lungs ) returns to the left atrium through the pulmonary veins , then it flows to the ventricle through a valve .

The left ventricle contracts pumping the blood rich in oxygen to all the body cells through a large artery called aorta .

The blood circulation

The blood circulation in the human body .

The wall of the left ventricle is more thicker than the right ventricle as the left ventricle pumps the blood to all the body cells , while the right ventricle pumps the blood to the  two lungs only .

When the right atrium receives the blood rich in carbon dioxide from the venae cavae , the left atrium receives the blood rich in oxygen from the pulmonary veins .

When the right ventricle pumps the blood to the lungs , the left ventricle pumps the blood to all the body cells .

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