exchanging substances
- Created by: Muskaan Dhaliwal
- Created on: 05-08-19 15:02
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- exchanging substances
- the greater the difference in concentrations the faster the rate of diffusion
- exchange surfaces are adapted to maximise effectiveness
- small intestines
- villi; increase surface area
- lungs
- alveoli; increase surface area
- good blood supply; to maintain concentration gradient
- thin membranes; short diffusion distance
- gills in fish
- gill filaments an lamella; increase surface area
- good blood supply; to maintain concentration gradient
- thin membranes; short diffusion distance
- root hair cell
- thin membranes; increase surface area
- leaves
- large surface area
- thin leaves for short diffusion path
- stomata on lower surface
- to let o2 and co2 in and out
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