WHAT'S INSIDE: HUMAN BODY

The human body is an amazing structure made up of many fascinating parts and systems. Learn about the human body and how its systems work together.
  • Body Parts
  • Body Systems
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Back away from that speaker, turn down that iPod and put down that power tool unless you want the ringing in your ears to remain permanent. Sound can hurt you, and that ringing may be the first sign.

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