The skeletal system

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Across
  1. 5. Relatively thin and flat, and usually protect organs
  2. 6. Provides support for animal to stand;usually longest bones in body
Down
  1. 1. Are irregularly shaped, and function as support and protection
  2. 2. Firm tissue that isn't as hard as bone and is somewhat flexible
  3. 3. Connections of bones in the animal's body
  4. 4. Mostly found in joints and give flexibility