unit 4: skeletal system

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4 Terms

1
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skeletal system

  • 206 bones

  • babies are born with 300+ that fuse as they grow

2
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two systems

axial and appendicular

3
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axial skeleton

  • 80 bones

  • central axis support

  • supports and protects internal organs 

  • contains skull, rib cage, vertebral column

4
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appendicular skeleton

  • 126 bones

  • allows movement

  • contains limbs, pelvic bones, and shoulder areas