GAS EXCHANGE
- Created by: Rumbi
- Created on: 17-03-13 15:25
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- GAS EXCHANGE
- Plants
- leaves
- Thin, flat provide large surface area
- Night-photosynthesis. Day -respiration
- Cells
- Palisade- contain chloroplasts for photosynthesis
- Spongy mesophyll- gas excahnge
- leaves
- Insects
- Spiracles- holes for gas exchange & closed to prevent water loss
- Short difffusion gradient
- Small SA:Vol ratio
- Plants
- Xerophytes
- Plants
- leaves
- Thin, flat provide large surface area
- Night-photosynthesis. Day -respiration
- Cells
- Palisade- contain chloroplasts for photosynthesis
- Spongy mesophyll- gas excahnge
- leaves
- Thick waxy layer: stops evaporation through leaf cells
- Sunken Stomata: maintains humidity, diffusion gradient reduced
- Plants
- Sunken Stomata: maintains humidity, diffusion gradient reduced
- Rolled leaves: maintain humidy, reduced diffusion gradient
- Xerophytes
- Thick waxy layer: stops evaporation through leaf cells
- Xerophytes
- Hairy leaves: trap layer of water
- Tracheal tubes- pipes which oxygen moves through
- Spiracles- holes for gas exchange & closed to prevent water loss
- Tracheoles- brings air to respiring tissues
- Tracheal tubes- pipes which oxygen moves through
- Tracheal tubes- pipes which oxygen moves through
- Large SA:Vol ratio
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