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Lesson Ten Assessing Breathing Models

Lesson Ten Assessing Breathing Models. Objectives Design, construct, and operate a model that simulates the breathing process. Assess the strengths and limitations of breathing model Recognize basic structure and function of respiratory system Bellwork

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Lesson Ten Assessing Breathing Models

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  1. Lesson TenAssessing Breathing Models Objectives Design, construct, and operate a model that simulates the breathing process. Assess the strengths and limitations of breathing model Recognize basic structure and function of respiratory system Bellwork Read Excuse Me, Please! P 77 Explain what causes burps and hiccups.

  2. Introduction May read Excuse Me, Please! aloud and discuss bellwork. Have a student demonstrate deep breathing while student record everything they observe happening. Discuss their observations. Study the diagrams in Figure 10.2 p 80 in SG. What happens to the pressure in the lungs when the diaphragm moved downward? What happens to the pressure in the lungs when the diaphragm moved upward? Explain the breathing process and gas exchange. Notes are provided in background information of TM pg113-116.

  3. Background: continued (Demonstrate the bell jar model for breathing. Discuss gas exchange in the lungs – see Fig. 10.3 p 81 in SG) Add this chart to your notebook and complete it Bell Jar Model Strengths Limitations

  4. Problem What happens to a balloon when the plunger on a syringe is pulled downward? Hypothesis If the plunger on a syringe is pulled downward then…__________ because…____________ Materials Syringe and balloon (do not use any water!)

  5. Procedure Develop a procedure to make a model of the lungs from the materials. 1. 2. 3. • Data • What part of the model is compared to the diaphragm? The mouth? The chest cavity? • Complete the chart comparing strengths and limitations. • Strengths Limitations

  6. Conclusion Illustrate and describe what happens when the rubber sheet/plunger is pulled downward. Illustrate and describe what happens when the rubber sheet/plunger moves upward. Next Question Homework Spies-The Second Journey Begins – p 85 (Use reflection question 3, create a set of questions, ARI strategy, group/class reading, read and take notes) Extensions ( p 122 in TM)

  7. Vocabulary Diaphragm Intercostal muscles Inhale Exhale Gas exchange Diffusion Oxygen Carbon dioxide

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