GAS EXCHANGE IN INSECTS Flashcards Preview

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Flashcards in GAS EXCHANGE IN INSECTS Deck (9):
1

terrestrial insect gas exchange (2)

- thin permeable surface
- large area

2

how do insects prevent dehydration? (3)

- waterproof layer covering body i.e exoskeleton
- spiracles open and close when needed
- hairs covering spiracles prevent solid particles getting in

3

what is an insect exoskeleton made from? (2)

- chitin and protein
- waxy layer

4

spiracles (3)

- paired holes
- where gas exchange occurs
- run alongside body

5

tracheae (3)

- branched pipes from spiracles
- lined with chitin
- fluid-filled, close to muscle fibres

6

tracheoles

- smaller tubes

7

how do insects take in o2 when resting?

- diffusion through spiracles, tracheae, tracheoles

8

how do insects take in o2 in flight?

- movement of abdomen ventilates tracheae

9

why do insects have no respiratory pigment?

- interface between tracheae is where ge occurs, directly in and out of muscle fibres so no circulation needed