1. How do we breath? Developing: Describe the function of the lungs.
Secure: Explain how the structure of the lungs allows for efficient gas exchange.
Exceeding: Analyse how the lungs are adapted to their function.
Entrance Activity
1) Write the word equation for respiration
2) Lime water demonstration
Tool Box – Key words
Breathing
Ventilation
Mucus
Cillia
Diffusion
Surface area

2. The Respiratory System Discuss the following topics with your table:
Discussion Activity
The Respiratory System
Discuss the following topics with your table:
What is the function of the lungs?
How do the lungs perform their function??

3. Teacher Explanation
Breathing

4. Learning Activity
Parts of the lung
Attempt to complete the respiratory labelling activity on the Respiratory System learning sheet. Then move on to question 2 and complete all of the sentences.

5. How do we breath? Developing: Describe the function of the lungs.
Secure: Explain how the structure of the lungs allows for efficient gas exchange.
Exceeding: Analyse how the lungs are adapted to their function.
Entrance Activity
1) Write the word equation for respiration
2) Lime water demonstration
Tool Box – Key words
Breathing
Ventilation
Mucus
Cillia
Diffusion
Surface area

6. Teacher Explanation
Gas Exchange

7. Teacher Explanation
Gas Exchange

8. Explain how gases are exchanged in the lungs. (4marks)
Exam play
Gas Exchange
Explain how gases are exchanged in the lungs. (4marks)
Success Criteria
Use 5 of the key words in your explanation.
Define the term oxygenated and deoxygenated.
Describe the alveoli
Draw a diagram of the alveoli to help with your explanation.
Key Words
Diffusion Inhale
Exhale Oxygen
Carbon dioxide Blood
Capillaries RBC

9. How do we breath? Developing: Describe the function of the lungs.
Secure: Explain how the structure of the lungs allows for efficient gas exchange.
Exceeding: Analyse how the lungs are adapted to their function.
Entrance Activity
1) Write the word equation for respiration
2) Lime water demonstration
Tool Box – Key words
Breathing
Ventilation
Mucus
Cillia
Diffusion
Surface area

10. Comparing inhaled and exhaled air
Data Analysis
Comparing inhaled and exhaled air
What are the differences between inhaled and exhaled air?
Inhaled Air
Exhaled Air
Oxygen: 21%
Oxygen: 16%
Carbon dioxide: %
Carbon dioxide: 4%
Water vapour: small amount
Water vapour: large amount
What are the main differences?
Explain why these changes have occured?

11. How are the alveoli adapted?
Teacher Explanation
How are the alveoli adapted?
The alveoli have 4 key adaptations which allow for rapid gas exchange:
Without these factors the alveoli wouldn’t be able to exchange gases as quickly as the body requires them.
Large surface area
One cell thick wall
Large blood supply
Large concentration gradient

12. Homelearning
Key Word Cross Word
Using the crossword template, create a crossword usng the key words we have learnt in this topic thus far. This will be used next lesson to test your partners knowledge.

13. How do we breath? Developing: Describe the function of the lungs.
Secure: Explain how the structure of the lungs allows for efficient gas exchange.
Exceeding: Analyse how the lungs are adapted to their function.
Entrance Activity
1) Write the word equation for respiration
2) Lime water demonstration
Tool Box – Key words
Breathing
Ventilation
Mucus
Cillia
Diffusion
Surface area

14. Plenary
Summary Sheet
Complete the summary sheet for todays lesson. Then check your answers with your partner.