in the left fifth intercostal space, in line with the middle of the clavicle
SA node, AV node, AV bundle, bundle branches, Purkinje fibers
left atrium and posterior part of the left ventricle
The heart is displaced superiorly and to the right.
Preventing eversion of the valves into the atria.
Ventricular contraction (ventricular systole)
ventricular contraction and ventricular filing
Cardiac muscle tissue exhibits inherent rhythmicity, which is the basis of coordinated heartbeats
supply parasympathetic innervation to the heart, which slows the heart rate.
The atria and ventricles are insulated from each other by the fibrous skeleton of the heart.
ventricles, the pulmonary valve prevents backflow into the right ventricle; the aortic valve prevents backflow into the left ventricle.
Pulmonary vein, blood returning to the heart from the lungs is oxygenated.
Papillary muscle are extensions from the ventricular wall that connect to the chordae tendinae. Upon ventricular contraction, the papillary muscles contract to prevent the atrioventricular valves from everting into the atria.
Epicardium is the outer layer of the heart wall
The left ventricle, because it pumps blood at a higher pressure
the parietal pericardium and the visceral pericardium
The pulmonary trunk
The superior cena cava
visceral layer of serous pericardium
myocardium (“muscle heart”)
Superior and inferior vena cava and the coronary sinsus
vibrations that result from the semilunar valves slamming shut
The pulmonary vein
pump blood with greater pressure
The great cardiac veins