1. Respiration

2. Respiration
A while ago we learnt about ___ ______. Each of these life processes needs ENERGY. ___________ is the process our bodies use to produce this energy:
Glucose + oxygen water + carbon dioxide + ENERGY
The glucose we need comes from ______ and the oxygen from _________. Water and carbon dioxide are breathed out. The MAIN product of this equation is _________.
Words – breathing, energy, Mrs Gren, respiration, food
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3. Where does respiration occur?
In the Mitochondia of a cell

4. Gas Exchange 0.03% 3% 21% 18% 79% 79% Air breathed in Air breathed out
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5. Teacher demo
Experiment 7.3 (2)
Test for CO2

6. The Trachea
These rings are made of a tough material called Cartilage. They help to hold the tube open.
The trachea branches into 2 bronchi – one into the left lung, one into the right.

7. Inside the breathing tubes
Inside the breathing tubes are ciliated epithelial cells. These have tiny hairs that trap dust and microbes. They also produce sticky mucus – they are specialised cells.

8. Task 2: label The Respiratory System
Trachea – has stiff rings of cartilage to prevent it collapsing
Bronchi
Bronchioles
Rib muscles – to raise and lower the ribs
Ribs – to protect the chest
Lung
Alveoli (“air sacs”) – gas exchange takes place here
Diaphragm – muscular sheet
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9. Task 3: why are they good at exchanging gases?
Alveoli are very good at exchanging gases because…
They have a LARGE surface area
They have a good blood supply
They are moist
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10. The respiratory system

11. Task 4:Ventilation or Breathing

12. Ventilation/breathing

13. Gases enter the blood via diffusion

14. Task 5: Draw and illustrate how gases enter the cell by diffusion

15. Circulation 2) The blood is then taken back to the heart…
1) Blood gets pumped from the heart to the lungs and picks up oxygen
3) The heart pumps the blood to the intestine (where oxygen and glucose are removed)…
5) After the oxygen and glucose have been removed for respiration the blood is sent back to the heart and starts again
4) … and to the rest of the body (where oxygen is removed)
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