'It' is called blood circulation because 'it' regards the manner in which blood circulates around the body.
Blood when pumped out of the heart runs through arteries and veins in a loop motion, heading out from the heart to the extremities of your body, then looping back and returning to the heart.
Circulation of the blood
The movement of blood is called circulation.
The blood circulation in the Lungs, called the pulmonary circulation, is COMPLETELY a part of the general, systemic circulation of Blood.
blood flow is called circulation
The flow of blood to and from the lungs is called pulmonary circulation.
William Harvey
It is called the pulmonary circulation, where blood travels to the lungs to receive oxygen and lose carbon dioxide, before returning to the heart.
If i remember right it is called 'Pulmonary Circulation'
Arterial circulation.
That would be blood.
circulation
The pulmonary circulation carries blood from the heart to the lungs and back. In the pulmonary circulation, arteries carry deoxygenated blood.