The Circulatory System

Look at the image on the left. What part of the circulatory system is this?

• Brain

• Lungs

• Heart

• Stomach

In this diagram, what do the blue and red lines represent?

• Bones

• Nerves

• Blood Vessels

• Muscles

Which blood vessels carry blood away from the heart?

• Veins

• Arteries

• Capillaries

• Nerves

Which blood vessels carry blood back to the heart?

• Veins

• Arteries

• Capillaries

• Tubes

What part of the circulatory system carries oxygen and nutrients to all parts of the body?

• Skin

• Bones

• Blood

• Lungs

What is the main job of the heart?

What are these small red circles?

• Muscle fibers

• White blood cells

• Nerve cells

• Red blood cells

What is another term used for white blood cells?

• Leucocytes

• Erythrocytes

• Fat cells

• Nerve cells

What is the name of the system in our body that includes the heart, blood, and blood vessels?

Explain why the circulatory system is important.