Blood Vessels Quiz

What is the function of arteries in the body?

• Carry blood from the heart to the organs

• Carry blood from the organs to the heart

• Carry blood from the heart to the lungs

• Carry blood from the lungs to the heart

Why do arteries have thick muscular walls?

• To keep the blood moving slowly

• To stop the blood flow backwards

• To withstand the high pressure of the blood

• To allow for easy diffusion of substances

What is the main function of capillaries in the body?

• To withstand the high pressure of the blood

• To allow rapid diffusion of substances between the blood and body cells

• To carry blood from the organs to the heart

• To carry blood from the heart to the organs

Why do capillaries have very thin walls?

• To stop the blood flow backwards

• To withstand the high pressure of the blood

• To allow for easy diffusion of substances

• To keep the blood moving slowly

What is the problem with the blood flow in veins?

• It travels slowly under low pressure

• It flows backwards

• It stops completely

• It travels at high pressure

What is the function of valves in veins?

• To keep the blood moving at high pressure

• To allow the blood to flow slowly

• To stop the blood flow backwards

• To allow blood flow backwards

Why do veins have thin walls?

• To allow for easy diffusion of substances

• To stop the blood flow backwards

• To withstand the high pressure of the blood

• To keep the blood moving slowly

What is the main function of elastic fibers in arteries?

• To keep the blood moving slowly

• To stop the blood flow backwards

• To withstand the high pressure of the blood

• To allow for easy diffusion of substances