The basic circulatory system of vertebrate animals, which are those with a backbone, consists of a heart, the blood and the arteries and system of blood vessels. The heart pumps the blood first to the arteries and then throughout the body via the system of blood vessels.
The heart is a muscular pump organ with two upper chambers, called atria, where the blood enters. After passing through a valve, the blood then enters one of the two lower chambers, called ventricles. The muscles of the ventricle contract to send the blood out of the heart and into the arteries. About the size of a fist, the heart muscle is extraordinarily durable, pumping about 3 billion times throughout the average human lifespan.
The blood carries nutrients, oxygen, water and waste products to and from the cells and organs through the system of blood vessels that exist throughout the body, sometimes traveling thousands of miles. There are different types of blood vessels.
The main function of the circulatory system is to move blood and lymph through the body. Doing this transports nutrients and oxygen to the cells of the body and removes waste products such as carbon dioxide. The circulatory system is necessary to regulate temperature and pH balance and protect the body from diseases.Full Answer >
The three functions of the circulatory system include maintaining normal body temperature, helping the body fight disease and providing the ideal chemical balance for homeostasis. The circulatory system consists of the heart, arteries, veins and blood.Full Answer >
The main organ in the circulatory system is the heart, according to Hillendale Health. The two other major parts of the circulatory system are the blood and the blood vessels.Full Answer >
The heart draws oxygenated blood from the lungs and distributes it to the rest of the body using a system of arteries and veins. Small coronary arteries and the pulmonary veins provide oxygenated blood into the heart. The pulmonary artery then pumps deoxygenated blood to the lungs where it is resupplied with oxygen.Full Answer >