- Long bones have a tubular shaft and articular surface at each end and refer to the arms (humerus, radius, and ulna) and the legs (the femur, tibia, and fibula) are all long bones.
- Short bones also have a tubular shaft and articular surfaces at each end; however, they are much smaller and include all of the metacarpals and phalanges in the hands, the metatarsals and phalanges in the feet, and the clavicle (collarbone).
- Flat bones are thin and have broad surfaces includeing the scapula (wingbone), the ribs, and the sternum (breastbone).
- Irregular bones are irregular in size and shape and are usually quite compact; for example, the bones in the vertebral column, the carpal bones in the hands, tarsal bones in the feet, and the patella (kneecap).
The collar bone ends at the sternum, forming one side of the sternoclavicular joint; where it ends at the shoulder, there forming one side of the acromioclavicular joint.
2. The thigh; regio femoralis.
Only one bone may be involved (fibrous dysplasia, monostotic) or several (fibrous dysplasia, polyostotic).
This may be caused by a disturbed calcium-phosphorus metabolism possibly resulting from excess parathyroid hormone.
2. One of a pair of large bones forming part of the lower cranium and containing various cavities and recesses associated with the ear; such as, the tympanic cavity and the auditory tube.
3. A reference to the region of the temple.
The temporal bone is connected with the mandible (the jawbone) via the temporomandibular joint; or the joint that hinges the lower jaw to the temporal bone of the skull.
Each temporal bone consists of four parts: the mastoid (rounded protrusion of bone just behind the ear), the squama (thin, expanded part of a bone; especially, in the the cranial wall), the petrous (stony hardness), and the tympanic (middle ear drum).
2. The hamate bone or the medial carpal bone in the row of carpal bones occurring closer to the fingers and farther from the wrist.
Bone also serves as a storage area for calcium, playing a large role in calcium balance in the blood.