A-Level Biology OCR A
Exchange Gas Adaptations Insect Oxygen Surface Area Tracheae
| Front |
Describe the adaptations of the insect gas exchange system that make it an efficient exchange surface. |
| Back |
Adaptations of insect gas exchange system:- Spiracles for air to diffuse in, can be opened and closed to minimise water loss when oxygen demand low
- High surface area for gas exchange due to branching of tracheae
- Tracheoles - single cells - short diffusion distance
- During exercise, muscle movements ventilate tracheae and maintain concentration gradient
- During exercise, lactic acid draws out more tracheal fluid which increases surface area for oxygen absorption
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A-Level Biology OCR A