Gas exchange in simple unicellular organisms

hayley
Mind Map by hayley, updated more than 1 year ago
hayley
Created by hayley over 7 years ago
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Biology unit 2 Mind Map on Gas exchange in simple unicellular organisms, created by hayley on 04/11/2013.
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Gas exchange in simple unicellular organisms
1 The cell membrane is the site of gas exchange
2 Example of a unicellular org
2.1 Amoeba
3 Where do they live
3.1 Live in water and diffusion of gases occurs over the whole body surface
4 They have:
4.1 A large surface area to volume ratio
4.2 Their membranes are thin and moist
4.3 Short diffusion pathways
4.4 Are small and need to be small in order for diffusion to be efficient
5 How they become larger
5.1 Aggregate their cells together
6 The process of diffusion is slow
6.1 WHY?
6.1.1 Materials need to be exchanged between different organs as well as the environment
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