fibers that form the right and left branches of the bundle of His and extend along outer walls of the ventricles, causing them to contract.
Deoxygenated blood from the body returns to the heart and enters here.
SA Node. Specialized group of cardiac cells that functions as the natural pacemaker of the heart, located in the upper portion of the right atrium and responsible for the electrical impulse that fires the heart.
Movement of blood from the heart throughout the entire body and back.
Heart valve located between the right atrium and the right ventricle.
Does not carry oxygenated blood.
Blood vessel with valves that carries blood low in oxygen toward the heart.
Blood vessel that carries blood from the capillary to the vein.