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Understanding the Body [Risc OS]
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AcornWin_Anglia_UnderstandingTheBody.iso
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1995-06-22
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276b
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Watch the clip carefully. A light is shone into the eye.
A message about the amount of light is passed along the optical nerve to the brain.
The brain sends a message to the muscles in the eye to make the pupil smaller to cut down the amount of light getting into the eye.