Understanding the Heart and Circulation

Which blood vessel receives blood from the head, arms, and chest and empties it into the right atrium of the heart?

• Inferior vena cava

• Superior vena cava

• Pulmonary vein

• Aorta

What is the main function of the aorta?

• To carry deoxygenated blood to the lungs

• To receive blood from the lower limbs

• To pump blood into the right atrium

• To distribute oxygenated blood to the body

Which valve is located between the right atrium and the right ventricle?

• Bicuspid (mitral) valve

• Tricuspid valve

• Aortic valve

• Pulmonary valve

Which chamber of the heart receives oxygenated blood from the lungs?

• Right atrium

• Left ventricle

• Left atrium

• Right ventricle

Which of the following best describes the function of capillaries?

• Carry blood away from the heart

• Carry blood back to the heart

• Allow exchange of substances between blood and body cells

• Pump blood into the aorta

Explain why the septum is important for the function of the heart.

• It pumps blood into the aorta

• It divides the right and left chambers, preventing mixing of oxygenated and deoxygenated blood

• It receives blood from the lungs

• It controls the opening and closing of heart valves

Compare the roles of arteries and veins in the circulatory system.

• Both carry blood away from the heart

• Arteries carry blood away from the heart, while veins carry blood back to the heart

• Both exchange gases with body cells

• Veins carry oxygenated blood, arteries carry deoxygenated blood

carry the oxygenated blood from the lungs into the left atrium of the heart

• pulmonary artery
• aorta
• vena cava
• pulmonary veins

Largest artery in the body

• coronary artery
• pulmonary artery
• femoral artery
• aorta

Which type of vessel is under high pressure and carries oxygenated blood?

• capillaries
• pulmonary

• artery

• vein