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biology... 'cells alive'

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by

pretzal gurl

on 16 October 2012

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Transcript of biology... 'cells alive'

Take a look at the different cells and their jobs... CELLS ALIVE These cells are in the stem and so are round tubes in shapes.

Unusually, they don't have
chloroplasts
nucleus
cytoplasm
cell membrane XYLEM CELLS:
The cells have cell walls between them to form a tube shape. These cells have adapted to absorbing water from the soil, by growing in length. This gives them a large surface area. Root hair cells do have
nucleus
cell membrane
cell wall
vacuole
ROOT HAIR CELLS nucleus vacuole cell wall PALISADE CELLS These cells are under the surface of the leaf.
Their job is to help the plant/flower out with photosynthesis: the way plants make their own food.

They catch sunlight, and their chloroplasts contain chlorophyll-the chemical which catches the light. cell membrane nucleus chloroplasts cell wall cell membrane vacuole NUCLEUS:
this contains the genetic material for the plant. Parts of the cells... CHLOROPLASTS:
these contain a green substance for photosynthesis, helping the plant to make it's own food.
CELL MEMBRANE:
controls what is going in and out of the cell.
Uses useful substances and harmful ones are kept out. VACUOLE:
this stores water and food, which is a sugary liquid. CELL WALL:
made of a strong material called cellulose, which supports the cell. CYTOPLASM:
chemical reactions go on in this. These reactions keep the cell alive.
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