The circulatory system, also referred to as the cardiovascular system, is responsible for pumping blood from the heart to the lungs to obtain oxygen. This oxygenated blood is then distributed to the different tissues and organs through the arteries. In contrast, deoxygenated blood is carried back to the heart by the veins.

This video by Amoeba Sisters provides an introductory overview of the circulatory, particularly describing the pathway of the blood as it travels through the heart.