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4640838
Gas Exchange- Insects
Description
A-Level Biology (Gas Exchange) Mind Map on Gas Exchange- Insects, created by Fauzia Ali on 24/02/2016.
No tags specified
biology
gas exchange
a-level
Mind Map by
Fauzia Ali
, updated more than 1 year ago
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Created by
Fauzia Ali
over 8 years ago
24
1
0
Resource summary
Gas Exchange- Insects
Active
Movements of abdomen ventilate the tracheae
Ends of tracheoles fluid-filled and close to muscle fibres
Interface where gas exchange takes place
Oxygen dissoles in fluid and diffues directly in muscle cells
No respiratory pigment or blood circulation need
CO2 diffuses reverse
Resting
Diffusion through spiracles, tracheae and tracheoles
Same method for O2 and CO2
Problems
Live in arid so water evaporates from body risking dehydration
Gas exchange need thin permeable surface conflicts with water conservation
Insects therefore have waterproof layer (e.g. exoskeleton with thin waxy layer over thick layer of chitin and protein
Structure
Paired holes:spiracles
Branches chitin lined tubes:tracheae
Smalles tubes: tracheoles
Can open and close: reduces water loss
Hairs on spiracles: reduces water loss and prevents solid particles entering
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