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upper chamber of the heart

Papillary muscle

struture from which chordae tendineae originates

Tricuspid valve

Prevents blood movement from right ventricle to right atrium

Pericardial sac

double layered membrane around heart

Interventricular sulcus

Groove separating left and right pulmonary arteries

Bicuspid valve

Prevent blood movement from left ventricle to left atrium

Pulmonary Trunk

Gives rise to left and right pulmonary arteries

Coronary Sinus

Drains blood from myocardium into right atrium


Inner lining of the heart chamber


layer largely composed of cardiac muscle tissue

Pericardial cavity

Space containing serous fluid to reduce friction during heartbeats

Cardiac vein

Drains blood from myocardial capillaries

Coronary artery

Supplies blood to heart muscle


Distributes blood to body organs except lungs

Atrioventricular Sulcus

Groove separating atrial and ventricular portions of heart

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