Explore the Circulatory System

What is the main function of the heart?

• To digest food and absorb nutrients.

• To pump blood throughout the body.

• To filter waste from the blood.

• To produce hormones for growth and development.

Name the blood vessels that carry blood away from the heart.

• Veins

• Capillaries

• Arteries

• Venules

What type of blood do veins carry back to the heart?

• Oxygenated blood

• Carbon dioxide-rich blood

• Deoxygenated blood

• Nutrient-rich blood

How does oxygen-rich blood travel through the body?

• Oxygen-rich blood travels from the heart through arteries to the body, delivering oxygen and returning as deoxygenated blood.

• Oxygen-rich blood travels through veins to the heart.

• Oxygen-rich blood is produced in the lungs and stays there.

• Oxygen-rich blood is absorbed directly by the skin and muscles.

What is the role of red blood cells in the circulatory system?

• Red blood cells are responsible for blood clotting.

• Red blood cells transport oxygen and carbon dioxide in the circulatory system.

• Red blood cells help in digestion and nutrient absorption.

• Red blood cells produce hormones in the circulatory system.