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Top 20 Directory:
Top : Kids_and_Teens : School_Time : Science : Living_Things : Animals : Mammals : Humans : Skeletal_System
Sites:
  		• Kidport 5th Grade Science: The Human Arm Bones: A clickable quiz of the human arm bones.
  		• Printable Blank Outline Diagram of the Human Skeleton: Blank diagram of the human skeletal system with answers at the bottom of the page.
  		• Science: Out of This World -- Bones: A basic overview of bone structure, including a quiz.
  		• Skeletal System: Real photographs of the human skeletal system, including a quiz.
  		• Space Bones: NASA science news about preventing the steady loss of bone mass that astronauts encounter. Includes audio and a downloadable file of the article.
  		• The Online Skeleton: Features a PDF download of the human skeleton, with close-ups of each part, and an explanation of the way they are connected.
  		• The Skeletal System: A 14-question interactive quiz.
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