It controls the movement of substances in and out of a cell
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Nerve cell: Adaptation
Long axon to Transmit messages across the body
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Sperm cell; Adaptation
Flagellum to swim around and fertilise the egg
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Root hair cell
Long extension increase surface area for absorbing water
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Tracheal cell
Has cilia to move particles out of lungs
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Red blood cell
To carry oxygen around the body
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Pholem
Long tubes to transport sugars
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Xylem
Dead tubes, waterproof to transport water and minerals.
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How are cells made?
Mitosis
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Cell cycle: prophase
The chromosomes star to become visible and nuclear evolope dissapears
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Cell cycle: metaphase
Chromosomes arrange themseleves at the centre of the cell and spindle fibres star to form
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Cell cycle: anaphase
The chromotids move to opposite poles and are pulled by the spindle fibres
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Cell cycle: telophase
Chromatids reach poles are noiw chromosomes again, they are no longer visible, the nuclear envolope refroms, spindle fibres disintergrate.
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Mitosis definition
Is a nuclear division, which results in cell division and production of 2 genetically identical daughter cells. the chromosomes number emains the same.
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