What is the primary function of the circulatory system?

Which organ pumps blood throughout the body?

What type of blood vessels carry blood away from the heart?

Which component of blood carries oxygen?

What is the iron-containing protein in red blood cells that binds with oxygen?

Which side of the heart pumps oxygen-poor blood to the lungs?

Which blood vessel carries oxygenated blood from the lungs to the heart?

What is the largest artery in the body?

What prevents blood from flowing backward in the heart?

Which part of the blood helps with clotting?

Which chamber of the heart pumps oxygenated blood to the body?

What is another term for high blood pressure?

What part of the heart initiates the heartbeat through an electrical signal?

Which blood vessels are only one cell thick and allow the exchange of oxygen and nutrients?

Which veins bring blood back to the right atrium of the heart?