Water, Water Everywhere

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  • Created by: Khadijah
  • Created on: 08-02-11 10:25

Osmosis in Plants:

The diffusion of water from a region of high concentration to a region of low concentration through a partially permeable membrane.


Plants use water to keep their leaves cool, transport minerals, enable to photosynthesise to produce glucose and keep cells rigid to ensure plant stays rigid.

In a leaf water moves out the the cell via osmosis, into the spaces of spongey mesophyll layer. The water will then leave the leaf by transpiration.

Mantaining support:

Plant cells have inelastic walls for support, the walls contain water in them. The cell walls prevents the cells from bursting.

- a lack of water; can cause a plant to wilt. The cell wall become less rigid because there is less pressure
- When there is enough water in the soil, the stomata will stay open to allow transpiration and diffusion of gases.
- When there is not enough water, the stomata will close to prevent transpiration and diffusion of gases.

Osmosis in Animal Cells:
Water diffuses in and out via osmosis. However, animal cells do not have cell walls. If there is too much water in the cell, it may burst.
1) In a weak solution;
they will burst.
2) Concentrated solution;



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