Cell, Skin, and Skeletal System

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Across
  1. 1. consists of 22 bones, supports the face and protects the brain
  2. 3. when the weather hot, skin will produce ....
  3. 4. outer layer of skin
  4. 7. protects our lungs and heart
  5. 9. the longest and strongest bone in your body
Down
  1. 1. covers and protects everything inside your body
  2. 2. the basic building block of all living thing
  3. 3. backbone
  4. 5. center of bones, where blood cells are made
  5. 6. part of skull, helmet that protects brain
  6. 8. made up of collagen and calcium