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Heart

TermDefinition
Mediastinum Area of thorasic cage where the heart is located
Coronary Sulcus Horizontal groove of heart
Interventricular Sulcus Vertical groove of heart
Atria Two chambers of the heart above the coronary sulcus
Ventricles Two chambers of the heart below the coronary sulcus
Coronary Arteries Carry oxygen-rich blood to the heart, 1st branches of aorta
Two major coronary arteries Right Coronary and Left Main Coronary
Right Coronary Artery Supplies right inferior
Left Main Coronary Supplies left anterior
Circumflex Supplies left inferior
Pericardium Serous membrane surrounding the heart (attached) and lining the pericardial cavity, reduces friction from pumping of the heart
Visceral Pericardium Part of the pericardium that surrounds the heart
Parietal Pericardium Part of the pericardium that lines the pericardial cavity
Pericardial Space Space between the visceral and parietal pericardium layers
Epicardium Thin, strong, outermost layer of the heart wall, becomes part of the pericardium
Myocardium Second layer of heart wall, cardiac muscle, thickest layer, responsible for contractile activity
Endocardium Innermost layer of heart wall, thinnest layer, coagulant resistant
Ischemia Oxygen starvation of a tissue
Infarction Death of tissue from oxygen starvation
Myocardial Infarction Heart Attack
Conduction System Responsible for heart stimulation
Electrical depolarization Caused by Na+ entry into cell, leads to contraction (stimulated)
Electrical repolarization Caused by K+ loss from cell, responsible for relaxation of cardiac muscle cells
Atrioventricular Valves Valves between the atria and ventricals of the heart
Tricuspid Right atrioventricular valve
Bicuspid (Mitral) Left atrioventricular valve
Semilunar Valves Valves at the bottom of the ventricals of the heart to allow blood to leave the heart
Pulmonary Valve Right semilunar valve
Aortic Valve Left semilunar valve
Systole Contraction of chamber
Diastole Relaxation of chamber
Created by: kcopeland10
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