The circulatory system moves blood to all parts of the body.

How big is the heart?

• Size of a golfball

• Size of your fist

• Size of your eyeball

• Size of your head

Name the system the heart is part of.

• circulatory

• digestive

• excretory

• nervous

Have many ventricles are in the human heart?

• 1

• 2

• 3

• 4

TRUE OR FALSE. Arteries move blood away. Veins allow blood to leave.

• true

• false

Name the artery that leaves the heart to take blood to the lungs.

• pulmonary artery

• pulmonary vein

• pulmonary capillary

• renal artery

Which of the following is NOT part of the circulatory system?

• heart

• blood

• bones

• arteries

Which of the following is a connection between the circulatory system and the muscular system?

• the heart is composed of cardiac muscle

• the heart makes calcium to give to muscles

• muscles create blood cells that get circulated through body

• the two systems are not connected

The main organ of the circulatory system is the ?

• Brain
• Lungs
• Heart
• Glands

Blood carries ?

• oxygen
• nutrients
• CO₂
• all of these

The smallest blood vessels are the ?

• veins
• arteries
• capillaries