Heart Chamber/valves/blood flow/ muscles

Question Answer
Atrium the small upper chambers
Ventricle the large lower chambers
Septum a central wall that divides the heart into right and left sides
Apex the inferior arch of the heart
Heart valves 4 valves control the flow of blood through heart
Tricuspid valve between right atrium and right ventricle; as right atrium contracts, the tricuspid valve opens to allow blood flow into the right ventricle then closes to prevent blood to flow back into right atrium; has chordae tendineae
Pulmonary valve between right ventricle and pulmonary trunk; as right ventricle contracts, the pulmonary valve opens to allow blood flow into pulmonary trunk and arteries then closes
Mitral valve between left atrium and left ventricle; as left atrium contracts, the mitral valve opens to allow blood flow into the left ventricle then closes; has chordae tendineae
Aortic valve between left ventricle and aorta; as left ventricle contracts, aortic valve opens to allow blood flow into the aorta then closes
Myocardium the muscular layer of the heart; composed of cardiac muscle; its muscle fibers respond to electrical impulses from a node in right atrium; contracts in a coordinated way to pump blood
Blood flow from body blood low in oxygen come into the heart via the superior and inferior vena cava,then to the right atrium.through the tricuspid valveto the right ventriclethrough the pulmonic valveto the pulmonary arteryto the lungs
Blood flow from lungs oxygenated blood from lungs go into heart via the pulmonary veins. blood comes into the left atrium, goes through mitral valve, into left ventricle then through aortic valve, into aorta to upper and lower body

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