The cardiovascular system is a really detailed system. I believe out of all the systems, this would be the longest. An average adult has four to six quarts in their body. It transports many substances. With each heartbeat we have, blood is sent everywhere in our bodies, carrying oxygen and nutrients to all of our cells. The heart is the main organ in the circulatory system. The heart gets signals from the body that tells it when to pump more or less blood for that person’s body. The blood goes through the capillaries which are situated between the arteries and veins. And the blood that has been depleted of oxygen by the body is then returned to the lungs and heart and also the veins. Pulmonary circulation is a system of blood vessels that forms
