Question
(i) Name the gaseous exchange surface in insects.
(ii) State two ways the surface named in (i) above is suited to its function.
(ii) State two ways the surface named in (i) above is suited to its function.
Answer
(i) The gaseous exchange surface in insects are known as tracheoles.
ii) 1. Adaptation of tracheoles
2. Lack chitin and are thin walled to reduce distance of diffusion of gases.
3. Have a liquid at the tip to dissolve the diffusing gases
4. Highly branched/divided to increase surface area for diffusion of gases.
5. They are in direct contact with tissue cells hence increasing rate of diffusion of gases.
ii) 1. Adaptation of tracheoles
2. Lack chitin and are thin walled to reduce distance of diffusion of gases.
3. Have a liquid at the tip to dissolve the diffusing gases
4. Highly branched/divided to increase surface area for diffusion of gases.
5. They are in direct contact with tissue cells hence increasing rate of diffusion of gases.
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