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Types of Bones

Types of Bones. Long Bones. Greater length than width Consist of a shaft and extremities (ends) Slightly curved for strength Consist mostly of compact bone (dense bone with few spaces) with some spongy bone (bone with large spaces )

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Types of Bones

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  1. Types of Bones

  2. Long Bones • Greater length than width • Consist of a shaft and extremities (ends) • Slightly curved for strength • Consist mostly of compact bone (dense bone with few spaces) with some spongy bone (bone with large spaces) e.g. thighs, legs, toes, arms, forearms, and fingers

  3. Short Bones • Somewhat cube-shaped and nearly equal in length and width • Spongy except at the surface where there is a thin layer of compact bone e.g. wrist, ankle bones

  4. Flat Bones • Generally thin and composed of two more or less parallel plates of compact bone enclosing a layer of spongy bone • Flat bones afford considerable protection and provide extensive areas for muscle attachment e.g. cranial bones, sternum,. ribs, scapulas

  5. Irregular Bones • Complex shapes and cannot be grouped into any of the other three categories • They vary in the amount of spongy and compact bone according to their functions e.g. vertebrae, and certain facial bones

  6. Sesamoid Bones • Small bones in tendons where considerable pressure develops • They function to diminish friction and alter direction of muscle pull • Their number varies greatly from person to person • All people have at least one sesamoid bone: the patella (kneecap)

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