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The Skeletal System Third Grade Science Class - PowerPoint PPT Presentation

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The Skeletal System Third Grade Science Class


When muscles contract, the bones act as levers, that allows various body ... The bones serve as a storage area for minerals such as calcium and phosphorus. ... – PowerPoint PPT presentation

Number of Views:14422
Avg rating:5.0/5.0
Date added: 21 July 2009
Slides: 13
Added by: Username withheld or not provided


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