1. Lesson Starter Which side of the heart is bigger and why?
What is the heart made of?
What are the different types of blood cells and what are their jobs?
What is the meaning of recovery time?

2. To learn about the Respiratory system
Learning Intention
To learn about the Respiratory system

3. The process by which you take IN oxygen and give OUT carbon dioxide.
What is breathing?
The process by which you take IN oxygen and give OUT carbon dioxide.
When you breathe in:
Your diaphragm goes down
Your ribs expand
Lungs get bigger
When you breathe out:
Your diaphragm goes up
Your ribs move inwards
Lungs get smaller

4. What is breathing? (copy)
The process by which you take IN oxygen and give OUT carbon dioxide.
When you breathe in:
Your diaphragm goes down
Your ribs expand
Lungs get bigger
When you breathe out:
Your diaphragm goes up
Your ribs move inwards
Lungs get smaller

5. Lungs Blood- picks up oxygen, drops off carbon dioxide Gas Exchange
Large surface area

7. Alveoli
Tiny air sacs- Adapted to make gas exchange in lungs happen easily and efficiently.
Features of the alveoli that allow gas exchange
Moist, thin walls (just one cell thick)
Massive surface area
Capillaries:- excellent blood supply

8. Alveoli (copy)
Alveoli are tiny air sacs found inside the lungs. They are adapted to make gas exchange easy and efficient.
Features of the alveoli that allow gas exchange
Moist, thin walls (just one cell thick)
Massive surface area
Capillaries:- excellent blood supply

9. The gases move by diffusion.
Gas Exchange
The gases move by diffusion.
High concentration to a low concentration:
Oxygen diffuses from the air in the alveoli into the blood.
Carbon dioxide diffuses from the blood into the air in the alveoli.

10. Lung Dissection

11. The structure of the lungs
Trachea= windpipe
Held open by rings of cartillage
Trachea splits into 2 Bronchi (bronchus)
Bronchus branch off into tiny branches- Bronchioles
Alveoli at end of bronchioles

12. Draw and label Trachea Bronchioles Bronchus Lung Alveoli (“air sacs”)
Diaphragm

13. Tweet Me
Using no more than 140 characters; tell me something you learned today that you didn’t already know.