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4640838
Gas Exchange- Insects
Descrição
A-Level Biology (Gas Exchange) Mapa Mental sobre Gas Exchange- Insects, criado por Fauzia Ali em 24-02-2016.
Sem etiquetas
biology
gas exchange
a-level
Mapa Mental por
Fauzia Ali
, atualizado more than 1 year ago
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Criado por
Fauzia Ali
mais de 8 anos atrás
24
1
0
Resumo de Recurso
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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