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Lesson 18 of 84 · The Human Body
ExperimentThe Endocrine System: Hormones
What You'll Learn
The nervous system has two main parts: the central nervous system (brain and spinal cord) and the peripheral nervous system (nerves throughout the body).
Key Words
- nervous system
- circulatory system
Materials Needed
- different scented items
- textured objects
- timer
- ruler
Safety First
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Step 1 — Read
Read the introduction and identify the main idea of this lesson.
Step 2 — Do
Build a model of the respiratory system using a plastic bottle, balloons, and a straw. Show how the diaphragm helps you breathe.
Step 3 — Observe
Look for patterns in your observations.
Step 4 — Record
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3What is the function of the heart?