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