3: EXCHANGE SYSTEMS AND MASS TRANSPORT - GAS EXCHANGE IN INSECTS Flashcards
1
Q
Why can’t insects rely on gas exchange across the body surface?
A
- high metabolic rate
- exoskeleton
2
Q
Advs of waxy substance on exoskeleton
A
- protects soft tissue as its not exposed
- waterproof so limits water loss
3
Q
Disadvs of waxy substance on exoskeleton
A
- heavy
- thicker exchange surface which decreases rate of diffusion
4
Q
What is the tracheal system?
A
system of tubes in insects that carries O2 directly to all tissues and organs in their bodys
5
Q
Describe the process of gas exchange in an insect
A
- air enters the insect through spiracles along the side of the body
- air moves into the trachea
- trachea are highly branched into many tracheoles which penetrate between cells and muscle fibres
- gas exchange occurs between tracheoles and body cells
6
Q
How is air moved in and out of insects?
A
abdominal pumping
7
Q
How are
A
