The Circulatory System Quiz

What is the main organ of the circulatory system?

• Brain

• Heart

• Liver

• Lungs

How many main parts does the circulatory system have?

• 3

• 2

• 1

• 4

What do arteries do?

• Connect arteries and veins

• Carry blood to the heart

• Produce blood cells

• Carry blood away from the heart

What is the function of capillaries?

• Pump blood

• Carry oxygen to the heart

• Connect arteries and veins

• Produce red blood cells

What does hemoglobin do?

• Produces hormones

• Fights infections

• Carries oxygen

• Clots blood

What are platelets responsible for?

• Blood clotting

• Fighting bacteria

• Carrying oxygen

• Transporting nutrients

What is plasma primarily made of?

• White blood cells

• Water

• Platelets

• Red blood cells

What is the largest artery in the body?

• Vein

• Arteriole

• Aorta

• Capillary

How does the heart's beat rate change with physical activity?

• Decreases

• Stops

• Increases

• Remains constant

What is the role of white blood cells?

• Transporting oxygen

• Clotting blood

• Producing hemoglobin

• Protecting the body from illness