![]() Note the chordae tendineae and papillary muscles, whose roles are to prevent valvular prolapse Problems with the valves may cause turbulent blood flow which can be heard through a stethoscope as murmurs.ĭiagram - The valves of the heart. On the left side is the aortic valve, formed from three leaflets.On the right side is the pulmonary valve, formed from three leaflets.The ventricles are connected to arteries by the semi-lunar valves: Papillary muscles found on the walls of the ventricles anchor the chordae tendineae to the walls to aid them in preventing prolapse. They prevent the valves from prolapsing (turning inside-out allowing blood to flow the wrong way) into the atria during systole - when the ventricles are contracting and pressures inside become high. On the left side is the mitral valve, formed from two leaflets.Ĭhordae tendineae are connective tissue cords that attach the leaflets of the atrioventricular valves to the walls of the ventricles.On the right side is the tricuspid valve, formed from three leaflets.The atria are connected to the ventricles by the atrioventricular valves: Note the direction of flowĬreative commons source by Wapcaplet This blood goes round the systemic circulation (rest of the body) and returns to the right atrium.ĭiagram - Labelled structures of the heart. The left ventricle receives blood from the left atrium and then pumps blood into the aorta.The left atrium receives oxygenated blood from the lungs via the four pulmonary veins and then pumps blood into the left ventricle. ![]() The right ventricle receives blood from the right atrium and then pumps blood into the pulmonary trunk which then goes to the lungs.The right atrium then pumps the blood into the right ventricle. The right atrium receives deoxygenated blood from the body via the superior and inferior vena cava.The interventricular septum divides the heart into the left and right ventricles, and the interatrial septum divides the left and right atria. The heart is split into a left and a right side, with each side having one atrium and one ventricle. It consists of four chambers: two atria and two ventricles. The Heart is a muscular organ in the thoracic cavity that pumps blood through vessels in the body. ![]()
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