how many types of bones in human body
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The bones of the body come in a variety of sizes and shapes. The four principal types of bones are long, short, flat and irregular.
- Bones that are longer than they are wide are called long bones. They consist of a long shaft with two bulky ends or extremities. They are primarily compact bone but may have a large amount of spongy bone at the ends or extremities. Long bones include bones of the thigh, leg, arm, and forearm.
- Short Bones - Short bones are roughly cube shaped with vertical and horizontal dimensions approximately equal.They consist primarily of spongy bone, which is covered by a thin layer of compact bone. Short bones include the bones of the wrist and ankle.
- Flat Bones - Flat bones are thin, flattened, and usually curved. Most of the bones of the cranium are flat bones.
- Irregular Bones - Bones that are not in any of the above three categories are classified as irregular bones.
- They are primarily spongy bone that is covered with a thin layer of compact bone.
- The vertebrae and some of the bones in the skull are irregular bones.
- All bones have surface markings and characteristics that make a specific bone unique.
- There are holes, depressions, smooth facets, lines, projections and other markings.
- These usually represent passageways for vessels and nerves, points of articulation with other bones or points of attachment for tendons and ligaments.
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There are four principle types of bones in human body
that are flat, short,irregular and long .
Bones that are longer than they are wide and are called LONG BONES.
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