The Heart

What is the primary role of the circulatory system?

• To regulate body temperature

• To filter toxins from the blood

• To produce blood cells

• To transport oxygen and nutrients to the body's tissues

How many main components does the circulatory system rely on?

• Three

• Two

• Five

• Four

What does the heart pump to keep moving through the vessels?

• Water

• Air

• Nutrients

• Blood

How many chambers does the heart consist of?

• Eight

• Four

• Six

• Two

What are the top chambers of the heart called?

• Ventricles

• Arteries

• Atria

• Valves

What prevents the blood from flowing backwards between the chambers and the vessels?

• Muscles

• Arteries

• Valves

• Veins

Which artery carries deoxygenated blood?

• Aorta

• Carotid artery

• Pulmonary artery

• Coronary artery

What is the function of the pacemaker cells in the heart?

• To filter the blood

• To produce electrical impulses for contraction

• To close the valves

• To oxygenate the blood

What is the correct definition of an artery?

• A vessel that carries deoxygenated blood only

• A vessel that carries blood away from the heart

• A vessel that carries oxygenated blood only

• A vessel that carries blood to the heart

What supplies the heart with its own oxygenated blood?

• Vena cava

• Pulmonary arteries

• Coronary arteries

• Pulmonary veins