The circulation of blood in the human heart is called double circulation because the blood enters and leaves the heart twice in each heartbeat. circulation of blood between the heart and the body organs is called systemic circulation. circulation of blood between the heart and the lungs is called the pulmonary circulation.
The left ventricle pumps the oxygenated blood into the systemic aorta. Iota gives off branches to all the organs of the body except the lungs. From these arteries, oxygen is diffused into the tissues. deoxygenated blood from visceral organs is brought to the right auricle by superior and inferior vena cava. this part of circulation from the left ventricle to the right auricle of the heart via body tissues is called systemic circulation.
The circulation of blood from the right ventricle to the left auricle of the heart via the lungs is called the pulmonary circulation. The right ventricle pumps deoxygenated blood to the lungs for oxygenation. Oxygenated blood from the lungs is returned to the left auricle by four pulmonary veins.