Lesson 10 - pages 164-175 in Teacher's Manual.
- Lots of supplies!
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To move, many parts of our bodies must work together. To produce the energy needed for movement, muscle cells need a constant supply of oxygen, nutrients, and water.
- Have you ever felt hungry after being physical (like a soccer game, swim meet, etc.)?
- Why do you think we get hungry after exercise?
- What do our cells need to stay healthy?
- How does the food we eat get to the cells in our body?
- Discuss the Digestive Process with this visual.
- Why does food need to be digested? What is the purpose of the Digestive System?
- Go over vocabulary:
- digestion: the process of breaking down food into simpler forms.
- digestive system: the body system that breaks down the food we eat so our bodies can use it for energy and other needs.
- enzymes: Chemicals that break down large, complex food particles into smaller, simpler nutrients.
- Explain directions. Don't stir too hard, or you'll rip your coffee filter!
- Use sticks to create groups of four.
- Have students gather materials.
- Have students complete the chart and questions while the lab is taking place.
- Use this Countdown Timer to keep track of time. Keep the volume LOW, please.
- Read SRB pages 81-88 while your simulated digestion is happening.
- Take screen shots of the charts and all questions and answers. Put them into a blog post entitled, "How Our Muscles Get Nutrients."
- If you have extra time, tell me what you think the answers are to these questions:
- Does the amount of enzyme (meat tenderizer) affect the rate of digestion (how fast it digests)?
- Does the temperature of the gelatin affect the rate of digestion (how fast it digests)?
- Does physical digestion (breaking down food into smaller pieces by chewing or cutting) affect the rate of digestion (how fast it digests)?
- So what happened to the gelatin that touched the enzyme (meat tenderizer)?
- What happened to the gelatin that wasn't touched by the enzyme (meat tenderizer)?
- Share answers from blog.
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