Cardiovascular structure

Which chamber receives deoxygenated blood before it is pumped into the pulmonary circulation?

Right atrium

Which valve with two cusps prevents backflow of oxygenated blood into the left atrium during left ventricular contraction?

Bicuspid (mitral) valve

Which chamber is responsible for pumping oxygenated blood into the aorta?

left ventricle

what are the muscular projections inside the ventricles that help secure the atrioventricular valves?

papillary muscles

which vessel receives deoxygenated blood from the right ventricle to carry it toward the lungs?

pulmonary trunk

Which intermediate muscular layer of the heart wall is responsible for contraction?

Myocardium

What is the muscular wall that separates the right and left ventricles?

interventricular septum

Which valve with three cusps is located between the right ventricle and the pulmonary trunk?

pulmonary semilunar valve

Which valve prevents the backflow of blood into the right atrium during right ventricular contraction?

tricuspid valve

What fibrous, thread-like structures anchor the AV valve cusps to the papillary muscles?

chordae tendineae