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

Study the diagram and label the parts you recognize.

Step 2 — Do

Map your pulse: measure your heart rate at rest, after 1 minute of walking, and after 1 minute of jumping. Create a bar graph and explain the differences.

Step 3 — Observe

Observe what happens and describe it in detail.

Step 4 — Record

Record your observations in your science journal with measurements and descriptions.

Check Your Understanding

Question 1

1 of 3

What do neurons do?