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Biology - Structure and dimensions of cells

Structure and dimensions of cells

Amoeba: the large surface area allows rapid absorption of materials

* cells whose function is to absorb materials have a large surface area
to volume ratio, and may have protoplasmic extensions

* photosynthetic cells have many chloroplasts and a large storage vacuole
- the cells of the water plant Elodea are packed with chloroplasts. View
the video.

Muscle cells: elongated and able to contract rapidly

* muscle cells have many mitochondria and are elongated

The nerve cell: the long extensions carry signals rapidly from one part
of the body to another

* nerve cells have long extensions for impulses to travel along, and
extensions to cross to other nerve cells

Cell walls: thickened in some plant tissues to provide support for the
plant's structure.

* strengthening fibres in plant tissues have thickened cell-walls

* sperm cells have a powerful flagellum [1] and many mitochondria - View
the video of mouse egg and sperm (highly specialised cells)

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Links:
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[1] http://alison.com/#