Atrium
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
Endocardium
Inner lining of the heart chamber
Myocardium
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
Aorta
Distributes blood to body organs except lungs
Atrioventricular Sulcus
Groove separating atrial and ventricular portions of heart