Gas Exchange- Insects

Fauzia Ali
Mind Map by Fauzia Ali, updated more than 1 year ago
Fauzia Ali
Created by Fauzia Ali about 4 years ago


A-Level Biology (Gas Exchange) Mind Map on Gas Exchange- Insects, created by Fauzia Ali on 02/24/2016.

Resource summary

Gas Exchange- Insects
1 Active
1.1 Movements of abdomen ventilate the tracheae
1.2 Ends of tracheoles fluid-filled and close to muscle fibres
1.3 Interface where gas exchange takes place
1.4 Oxygen dissoles in fluid and diffues directly in muscle cells
1.5 No respiratory pigment or blood circulation need
1.6 CO2 diffuses reverse
2 Resting
2.1 Diffusion through spiracles, tracheae and tracheoles
2.2 Same method for O2 and CO2
3 Problems
3.1 Live in arid so water evaporates from body risking dehydration
3.2 Gas exchange need thin permeable surface conflicts with water conservation
3.2.1 Insects therefore have waterproof layer (e.g. exoskeleton with thin waxy layer over thick layer of chitin and protein
4 Structure
4.1 Paired holes:spiracles
4.1.1 Branches chitin lined tubes:tracheae Smalles tubes: tracheoles
4.1.2 Can open and close: reduces water loss
4.1.3 Hairs on spiracles: reduces water loss and prevents solid particles entering
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