Understanding the Heart and Circulatory System

What is the primary function of the heart in the circulatory system?

• To store oxygen

• To filter waste products

• To pump blood throughout the body

• To produce blood cells

How many chambers does a normal heart have?

• Five

• Four

• Three

• Two

What is the role of heart valves?

• To increase blood pressure

• To prevent blood from flowing backward

• To store blood

• To produce oxygen

Where does blood pick up oxygen in the circulatory system?

• In the kidneys

• In the lungs

• In the liver

• In the heart

How does the heart receive its own supply of oxygen?

• Through the aorta

• From the lungs directly

• Via the coronary arteries

• Through the blood in its chambers