1. Which organs are involved in the Respiratory system (breathing)
Diaphragm
Trachea
Bronchus
Aorta
Mouth
Alveoli
Rib cage
Larynx
Ciliated epithelial cells
Oesophagus
Lungs
Bronchioles
Arteries
Heart
Intercostal muscles
Stomach
Nose

2. Circle which organs are involved in the Respiratory system (breathing)
Diaphragm
Trachea
Bronchus
Aorta
Mouth
Alveoli
Rib cage
Larynx
Ciliated epithelial cells
Oesophagus
Lungs
Bronchioles
Arteries
Heart
Intercostal muscles
Stomach
Nose

3. Respiratory system and breathing
Lesson objectives:
To know about the breathing system and be able to identify all the organs involved.
To be able to explain how breathing occurs.

4. Larynx
Trachea
Ribs
Alveoli
Bronchi
Bronchioles
Lung
Intercostal
muscles
Diaphragm

5. A closer look
Which divide into smaller tubes called bronchioles until you get to the alveoli (air sacs)
The tube leading to the lungs is called the trachea …
Which divides into two smaller tubes called bronchi

6. Respiratory (breathing) System Activity
Label the following:
Larynx
Trachea
Bronchi
Bronchioles
Lung
Diaphragm
Alveoli

7. Respiratory System Label your diagram
Larynx
Trachea
Bronchioles
Bronchi
Lung
Alveoli
Diaphragm

8. How do we breathe? When the diaphragm moves up …
the lungs are squeezed and air is forced out
And it all happens without you trying!
the lungs expand and air is drawn in.
Watch how it controls breathing
When the diaphragm moves down …
The diaphragm is a very powerful muscle.
diaphragm

9. Activity Sketch, complete and annotate a diagram to describe:
Breathing in
Breathing out
You must explain clearly all the actions and processes involved in breathing.

10. Peer assessment criteria
Breathing in:
The diaphragm contracts (moves down)
The intercostal muscles contract moving the rib cage up and out.
The volume increases
The pressure decreases.
Air is sucked in
Ribs move up and out
Diaphragm moves down

11. Peer assessment criteria
Ribs move in and down
Breathing out:
The diaphragm relaxes (moves up)
The intercostal muscles relax moving the rib cage down and in.
The volume decreases
The pressure increases.
Air is forced out
Diaphragm moves up

12. Plenary

13. Which is the odd one out and why?
Gullet
Trachea
Bronchiole
Why

14. Which is the odd one out and why?
Stomach
Bronchi
alveoli
Why

15. Which is the odd one out and why?
Diaphragm
Bronchiole
intercostal muscles
Why

16. Why are the lungs spongy?
Full of air
bronchioles
Alveoli
Why