The blood circulation in the circulatory system
The blood circulation
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 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.