16810992
Description
Flashcards by Sam Gunnell, updated more than 1 year ago
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Created by Sam Gunnell
almost 6 years ago
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| Question | Answer |
| What three problems with gaseous exchange do insects face? | Insects are very active so need lots of oxygen They have a tough exoskeleton so no gaseous exchange can occur There are no oxygen carrying blood pigments |
| What are spiracles? | Small openings along the thorax and abdomen |
| How does air enter and leave insects? | Through the spiracles |
| How does air travel around the insect? | Trachea lead away from the spiracles and these trachea divide into tracheoles. |
| Why does air have to be transported around the insects rather than in blood? | Insects don't have oxygen carrying pigments in the blood like humans do |
| How do collapsible air sacs increase the uptake of oxygen? | They act as air reservoirs, increasing the volume of air moving through the xchange system. They usually inflate and deflate bt movements of the abdomen |
| Where does gaseous exchange take place in insects? | Tracheoles |
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