Sure! Here’s a worksheet about lungs and alveoli for year 7 students:

Title: Lungs and Alveoli

Instructions: Answer the following questions based on your knowledge of lungs and alveoli.

1. What is the main function of the lungs?
2. How many lungs do humans have?
3. What is the purpose of the alveoli?
4. Describe the structure of the alveoli.
5. How are the alveoli adapted for their function?
6. What is the process of gas exchange that occurs in the alveoli?
7. What happens to the oxygen in the alveoli?
8. What happens to the carbon dioxide in the alveoli?
9. How does oxygen reach the alveoli?

10. How does carbon dioxide leave the body?

11. Label the following parts of the respiratory system on the diagram below: a) Trachea b) Bronchi c) Lungs d) Diaphragm e) Alveoli

[Insert diagram of the respiratory system]

1. True or False: The diaphragm is a muscle that helps with breathing.
2. True or False: The trachea is also known as the windpipe.
3. True or False: The bronchi are the smallest airways in the lungs.

4. True or False: The alveoli are responsible for the exchange of oxygen and carbon dioxide.

5. Explain why it is important to have a large surface area in the alveoli for gas exchange.
6. What happens to the alveoli when a person has a condition like emphysema?
7. How does smoking affect the lungs and alveoli?
8. Name one other respiratory condition that can affect the lungs.
9. What are some ways to keep your lungs healthy?

Note: You can add more questions or modify the worksheet as per your requirements.