What is the first structure that blood will enter after it has exited the right atrium?Multiple Choiceleft atriumpulmonary arteryaortaright ventricle

What structure empties blood into the left ventricle?Multiple choice question.left atriumpulmonary veinsright ventricleaorta

Where does the blood that enters the left atrium come from?Multiple choice question.right ventricleleft ventriclepulmonary veinspulmonary arteries

What is the first chamber oxygenated blood enters?left atriumleft atrioventricular valveleft ventricle

Blood passing through the right atrioventricular valve has just left which heart chamber?Group of answer choicesright atriumright ventricleleft atriumleft ventricle

Which chamber of the heart pumps blood into the pulmonary circuit?Multiple Choiceright atriumright ventricleleft atriumleft ventricleaorta