Blood: Red Cells, White Cells, Platelets (Part 2)

What You'll Learn

Red blood cells carry oxygen using a protein called hemoglobin. White blood cells fight infection. Platelets help form blood clots to stop bleeding when you get a cut.

Key Words

tissue
heart

Materials Needed

stethoscope (toy)
sponge
water
blindfold
cotton balls

Safety First

Do not taste any materials.

Steps

Step 1 — Read

Read and learn: Red blood cells carry oxygen using a protein called hemoglobin. White blood cells fight infection. Platelets help form blood clots to stop bleeding when you get a cut.

Step 2 — Do

Repeat the experiment two more times for accuracy.

Step 3 — Observe

Observe what happens and describe it in detail.

Step 4 — Record

Record your observations in your science journal.

Check Your Understanding

Question 1

1 of 3

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