Specialised Cells
- Created by: isabella newsum
- Created on: 16-11-14 16:34
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- Specialised Cells
- Palisade Leaf Cells
- Adapted for Photosynthesis, as they are packed with Chloroplasts
- Chloroplasts crammed at the top of the cell- near light
- Tall shape- lot of surface are exposed down the side for absorbing CO2
- Thin shape
- Chloroplasts crammed at the top of the cell- near light
- Guard Cells
- Open and close the stomata
- Lots of water- guard cells are full and go plump and turgid- stomata opens so gases can be exchanged for photosynthesis
- Short of water- guard cells lose water and become flaccid- stomata closes to stop too much water vapour escpaing
- Thin outer walls and thickened inner walls
- Sensitive to light and close at night to save water
- Red Blood Cells
- Concave shape= big surface area for absorbing oxygen
- Therefore pass smoothly through capillaries
- Packed with haemogoblin
- No nucleus
- Packed with haemogoblin
- Concave shape= big surface area for absorbing oxygen
- Sperm and Egg Cells
- Specialised for reproduction
- Egg cell- nourish the developing embryo in the early stages
- Sperm cell- male DNA to the female DNA, a lot of mitochondria= energy, long tail and a streamlined head to help it swim to the egg
- When sperm fuses with the egg, the egg's membrane instantly changes to stop any more sperm getting in- make sure offspring ends up with the right no. of chromosomes
- Palisade Leaf Cells
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