Understanding the Heart and Circulatory System

What is the primary function of the heart?

• To produce hormones

• To pump blood throughout the body

• To digest food

• To filter waste from the blood

Which part of the heart receives blood coming into it?

• Atrium

• Pulmonary arteries

• Aorta

• Ventricles

How does oxygen-rich blood return to the heart?

• Through the right atrium

• Via the pulmonary arteries

• Through the left atrium

• Via the aorta

What can disrupt a normal heartbeat?

• Myocardial infarction

• A balanced diet

• Adequate sleep

• Regular exercise

How extensive is the network of blood vessels in the human body?

• 10,000 miles

• 30,000 miles

• 100,000 miles

• 60,000 miles