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Structure from which chordae tendinae originate

papillary muscles

Prevents blood movement from right ventricle to right atrium

tricuspid valve

Membranes around the heart

pericardial sac

Prevents blood movement from the left ventricle to left atrium

mitral valve

Gives rise to left and right pulmonary arteries

pulmonary trunk

Drains blood from myocardium into the right atrium

coronary artery

Inner lining of heart chamber

endocardium

Layer largely composed of cardiac muscle tissue

myocardium

Space containing serous fluid to reduce friction during heartbeats

pericardial cavity

Drains blood from myocardial capillaries

cardiac vein

Supplies blood to heart muscle

coronary artery

Distributes blood to body organs except the lungs

aorta

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