biology beckies work
- Created by: beckie012345
- Created on: 14-12-17 16:53
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- transport systems in plant
- structure of a leaf
- waxy cuticle
- leaves must be able to conserve water. Has a waxy cuticle which is transparent
- palisade mesophyll
- Adapted to allow the maximum light through the leaf
- spongy mesophyll
- mesophyll have a lot of chloroplastast
- spongy mesophyll has chloroplasts deeper in the leaf.
- Allow the interchange of CO2.
- vascular bundle
- xylem
- xylem vessels move water and minerlas
- water is needed for photosynthesis and for support
- minerals are needed to allow the plant to make proteins
- phloem
- phloem vessels move sugars
- Take the sugars al around the plant, including to store tissues like tubers.
- some insects like aphids can tap into phloem tubes to steal the sugars from the plant.
- xylem
- lower epidermis
- stomata
- Allowing gases to enter and exit the leaf
- The bad thing when the stomata opens to allow gas exchange is that water is lost.
- Replaced by water obtained through the roots
- upper epidermis
- waxy cuticle
- Transpiration
- plants need water to survive
- they use this to support their tissues
- Move dissolved substances around the plant
- THIS IS TRANSPIRATION
- transpiration stream
- The movement of water from the roots to the leaves of the plant through its xylem.
- plants need water to survive
- structure of a leaf
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