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Lesson 70 of 84 · Information Processing
ExperimentBreathing: The Respiratory System (Part 4)
What You'll Learn
The respiratory system brings oxygen into the body and removes carbon dioxide. When you breathe in, air enters the lungs where oxygen passes into the blood.
Key Words
- respiratory system
- circulatory system
- nutrients
Materials Needed
- paper
- markers
- tape
- mirror
Safety First
- Use materials only as directed in the experiment.
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
Steps
Step 1 — Read
Read and learn: The respiratory system brings oxygen into the body and removes carbon dioxide. When you breathe in, air enters the lungs where oxygen passes into the blood.
Step 2 — Do
Follow the procedure carefully, step by step.
Step 3 — Observe
Use your senses (except taste) to describe what you notice.
Step 4 — Record
Write a summary of your findings in 3-5 sentences.
Check Your Understanding
Question 1
1 of 3What does the respiratory system do?