# Lesson Ten Assessing Breathing Models - PowerPoint PPT Presentation

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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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### 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.

Introduction

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.

Background: continued

(Demonstrate the bell jar model for breathing. Discuss gas exchange in the lungs – see Fig. 10.3 p 81 in SG)

Bell Jar Model

Strengths

Limitations

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!)

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.

• StrengthsLimitations

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)

### Vocabulary

Diaphragm

Intercostal muscles

Inhale

Exhale

Gas exchange

Diffusion

Oxygen

Carbon dioxide