![]() ![]() Long bones are longer than they are wide (femur). Irregular bones have varied shapes, sizes, and surfaces features and include the bones of the vertebrae and a few in the skull. Irregular bones are all others that do not fall into the previous categories, with the exception of sesamoid bones (see below). ribs, cranial bones, bones of shoulder girdle). ![]() Flat bones have broad surfaces for protection of organs and attachment of muscles (ex. Short bones are short, cube-shaped, and found in the wrists and ankles. humerus, tibia, femur, ulna, metacarpals, etc.) are of this type. The bones of the upper and lower extremities (ex. Long bones are longer than they are wide and work as levers. There are generally five categories of bones: long bones, short bones, flat bones, irregular bones, and sesamoid bones. ![]()
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