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Skeletal system/tissues, joints and skeletal muscle (components of a long…

- - - - layer of protective hard tissue that is composed of repeating units osteon
      - Looks like solid, hard layer of bone
      - Makes up the diaphysis of long bones and the external layer of all bones
      - Provides protection and support; resists stresses produced by weight and movement
      - Osteon
- - - - Produces blood cells
      - -Children most marrow cavities contain red bone marrow
      - -Adults only found in axial skeleton, hip bones, and heads of femur and humerus
      - -Coexist with spongy bone trabeculae (thin plates)