This power point is for those teaching the new OCR A level Biology. It includes all parts of the 3.1.1. specification:
1. The need for specialised exchange surfaces
2. The features of an efficient exchange surface
3. The structures and functions of the mammalian gaseous exchange system
4. The mechanism of ventilation in mammals
5. Using a spirometer
6. The mechanisms of ventilation and gas exchange in bony fish and insects
7. Dissection of a fish PAG instructions
More coming soon, feedback welcome
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£2.50