Practice Quiz: Circulatory System

What is the main organ of the circulatory system?

• artery

• bronchi

• heart

• lungs

What is the main function of this organ in the circulatory system?

• break down food into nutrients

• exchange of gases like oxygen and carbon dioxide

• give energy to do work

• pump blood throughout the body

The heart is about the size and shape of a ...

• eyes

• fist

• head

• thumb

How does circulation of blood works?

• Deoxygenated blood goes to the lungs, back to the heart, then to the rest of the body.

• Blood travels throughout the body, goes to the heart, then to the lungs.

• Oxygenated blood first goes to the body, then to the lungs and back to the heart.

• Blood pumps to the rest of the body, goes to the heart, and back to the rest of the body.

What part of the heart is pointed by the arrow?

• aorta

• atrium

• ventricle

• vein

What part of the heart is pointed by the arrow? It carries oxygenated blood from the heart to the rest of the body.

• aorta

• artery

• ventricle

• vein

Blood carries oxygen and waste products to be removed from the body. Name one other component that blood carries to all parts of the body.

• carbon dioxide

• oxygen

• nutrients

• hemoglobin

Which blood vessel carries oxygen-rich blood AWAY from the heart?

• aorta

• artery

• capillary

• vein

What is the role of capillaries in the circulatory system?

• Transport oxygenated blood to the heart

• Connect arteries and veins for nutrient exchange

• Carry deoxygenated blood to the lungs

• Regulate blood pressure

Which is TRUE about veins. Select TWO.

• carries oxygen-poor blood

• picks up oxygenated blood

• carries blood into the heart

• passes oxygen and nutrients to the cells