The heart is the muscle that pumps blood filled with oxygen and nutrients through the blood vessels to the body tissues. The atria receive blood coming back to the heart. The ventricles pump the blood out of the heart. Blood vessels, which compose a network of arteries, and veins that carry blood throughout the body. Arteries transport blood from the heart to the body tissues.
Veins carry blood back to the heart.
Four valves to prevent backward flow of blood. Each valve has flaps, called leaflets, that allow the forward flow of blood and prevent the backward flow. An electrical system of the heart controls how fast it beats. All rights reserved. All information is intended for educational purposes only and is not a substitute for medical advice or treatment for specific medical conditions.