Cardiovascular System

Which chamber of the heart pumps blood to the aorta?

• Left atrium

• Left ventricle

• Right atrium

• Right ventricle

The valve that lies between the right ventricle and the pulmonary trunk is the _____________.

• Mitral

• Tricuspid

• Aortic

• Pulmonary

Which chamber of the heart receives blood from the superior vena cava?

• Left atrium

• Left ventricle

• Right atrium

• Right ventricle

The systemic circuit begins at the left atrium, carries oxygenated blood to the tissues, and ends just before the right atrium.

• True

• False

Which structure prevents blood from flowing back into the left atrium from the left ventricle?

• Bicuspid valve

• Tricuspid valve

• Aortic valve

• Pulmonary valve

Which structure is the pacemaker of the heart?

• Atrioventricular (AV) node

• Sinoatrial (SA) node

• Myocardium

• Right ventricle

What is the innermost layer of the heart called?

• Endocardium

• Myocardium

• Epicardium

• Chordae tendinae

Which structure receives deoxygenated blood?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Which blood vessel contains deoxygenated blood?

• Inferior vena cava

• Aorta

• Pulmonary vein

• Femoral artery

Which structure prevents blood from flowing back into the right ventricle from the lungs?

• Bicuspid valve

• Tricuspid valve

• Aortic valve

• Pulmonary valve