The process by which blood is pumped throughout the body is known as circulation. This is primarily facilitated by the heart, which pumps oxygenated blood from the lungs through the arteries to tissues and organs, while deoxygenated blood returns through the veins. Proper circulation is vital for transporting nutrients, oxygen, hormones, and waste products to and from cells. The circulatory system plays a crucial role in maintaining homeostasis and overall health in living organisms.