Diffusion through Cell Membranes
- Created by: Jo Wells
- Created on: 02-04-13 14:05
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- Diffusion through Cell Membranes
- Gas Exchange
- Happens in Lungs
- To transfer oxygen to blood
- To remove waste carbon dioxide
- Lungs contain millions of alveoli
- Enormous surface area
- about 75m^2 in humans
- Moist lining for dissolving gases
- Very thin walls
- A good blood supply
- Enormous surface area
- Happens in Lungs
- Villi
- Inside the small intestine
- Provide a really big surface area
- So digested food is absorbed more quickly
- A single layer of surface cells
- A very good blood supply
- Quick absorption
- Gas Exchange
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