The Heart and Circulatory System (Part 2)

What You'll Learn

The circulatory system includes the heart, blood vessels, and blood. Arteries carry oxygen-rich blood away from the heart, and veins return oxygen-poor blood to the heart.

Key Words

response
reflex

Materials Needed

stethoscope (toy)
sponge
water
blindfold
cotton balls
cups

Safety First

Protect your work surface with newspaper or plastic.
Adult supervision recommended.

Steps

Step 1 — Read

Read and learn: The circulatory system includes the heart, blood vessels, and blood. Arteries carry oxygen-rich blood away from the heart, and veins return oxygen-poor blood to the heart.

Step 2 — Do

Gather your materials and set up your workspace.

Step 3 — Observe

Watch carefully for any changes and note the time.

Step 4 — Record

Create a data table to organize your measurements.

Check Your Understanding

Question 1

1 of 3

What system defends the body against germs?