Heart
Blood returning to the heart from the pulmonary circuit first enters the
Left atrium
the right ventricle pumps blood to the
right and left lungs
Blood returning to the heart from the systemic circuit first enters the
right atrium
the pulmonary semilunar valve prevents backward flow into the
right ventricle
correct order for the flow of blood entering from the systemic circulation
venecave, right atrium, right ventricle, pulmonary trunk, pulmonary veins, left atrium, left ventricle, aorta
the T wave on an ECG tracing represents
ventricular repolarization
the cusps (leaflets) of atrioventricular valves attach directly to the
chordae tendineae
the first heart sound
closing of the mistral valve
the function of the atrium is to
collect blood and pump blood to the ventricle
the visceral pericardium is the same as the
epicardium
the pulmonary veins carry blood to the
heart (left artirum)
the pulmonary arteries carry blood to the
lungs
the coronary sulcus is a groove that
marks the border between the atria and the ventricles
when the semilunar valves close, the AV valves then
open
contractions of the papillary muscles
prevent the atrioventricular valves from reversing into the atria
The great and middle cardiac veins drain blood into the
coronary sinus
in the middle of the thoracic cavity is a region occupied by the heart, great vessels, thymus, esophagus and trachea called the
mediastinum
Depolarization of the ventricles is represented on an electrocardiogram by the
QRS complex
the left ventricle pumps blood to the
aorta
The P wave represents
atrial depolarization
the earlike extension of the atrium is the
auricle
the bicuspid valve is located
between the left atrium and left ventricle
Blood is supplied to the myocardium by
the coronary arteries
the wall of the left ventricle is thicker than the right because
the left ventricle does more work than the right ventricle and the left ventricle produces a higher pressure than the right
blood flowing into the heart from the venae cavae flows next through the
tricuspid valve