Circulatory System Quiz

What is the main organ of the circulatory system?

• Lungs

• Brain

• Heart

• Liver

What is the function of white blood cells?

• Carry oxygen

• Produce energy

• Fight infection

• Pump blood

Which blood vessel carries blood away from the heart?

• Vein

• Capillary

• Pulmonary vein

• Artery

Where does oxygen exchange occur in the circulatory system?

• Arteries

• Veins

• Capillaries

• Heart valves

Which chamber receives oxygenated blood from the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the function of the left ventricle?

• Receive blood from the body

• Pump blood to the lungs

• Pump oxygenated blood to the body

• Receive blood from the lungs

Which blood vessel carries oxygen-poor blood to the lungs?

• Aorta

• Pulmonary vein

• Pulmonary artery

• Vena cava

What happens to blood in the lungs?

• It becomes deoxygenated

• It releases oxygen

• It gains oxygen

• It loses oxygen and gains carbon dioxide

Which part of the heart receives deoxygenated blood from the body?

• Left ventricle

• Right atrium

• Left atrium

• Aorta

Which vessel returns blood to the heart from the body?

• Aorta

• Pulmonary vein

• Vena cava

• Pulmonary artery