Transportation
- Created by: mollyridgway
- Created on: 04-05-18 21:17
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- Transport Systems
- Plants
- Xylem
- dead cells
- transports water and minerals
- from roots upwards
- thick cell wall, hollow lumen - column for water to move up
- Phloem
- from leaves to rest of plant
- transports glucose
- living cells
- mitochondria - release energy, move substances by active transport
- Xylem
- Humans
- What needs to be exchanged?
- oxygen
- carbon dioxide
- dissolved food molecules
- urea
- water
- What should exchange systems have?
- large SA to volume ratio
- supply of transport median
- thin membrane
- What surfaces do the following need?
- Examples
- alveoli
- the site of gas exchange in the lungs
- villi
- site of absorption off dissolved food molecules in small intestine
- alveoli
- What needs to be exchanged?
- Plants
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