What is bone?

Bone is the hard, semirigid, calcified connective tissue forming the skeleton of vertebrates.
For specific bones, see Appendix II.
alveolar b. The thin plate forming the walls of the tooth sockets.
ankle b. See talus, in Appendix II.
breast b. See sternum, in Appendix II.
brittle b.’s See osteogenesis imperfecta, under osteogenesis.
cancellous b. See spongy bone.
cheek b. See zygomatic bone, in Appendix II.
collar b. See clavicle, in Appendix II.
compact b. A type in which the bony substance is densely packed and the spaces and channels are narrow.
cranial b.’s The 21 bones forming the skull; the paired inferior nasal concha, lacrimal, maxilla, nasal, palatine, parietal, temporal, and zygomatic; and the unpaired ethmoid, frontal, occipital, sphenoid, and vomer.
dense b. See compact bone.
ear b.’s See auditory ossicles, under ossicle.
elbow b. See ulna, in Appendix II.
b.’s of the face The bones surrounding the mouth, nose, and part of the eye sockets ; i.e., the paired maxilla, zygomatic, inferior nasal concha, nasal, lacrimal, and palatine; and the unpaired mandible, ethmoid, and vomer.
flank b. See ilium, in Appendix II.
heel b. See calcaneus, in Appendix II.
hip b. See hipbone.
innominate b. Former name for hipbone.
irregular b. Any complex bone that does not conform to the long, short, or flat shape.
jaw b. See mandible, in Appendix II.
long b. Any bone having greater length than width, consisting of a tubular shaft, which contains a medullary cavity, and two expanded ends.
shin b. See tibia, in Appendix II.
short b. A bone having the general appearance of a cube and a relatively large proportion of spongy bone within a layer of compact bone.
spongy b. Bone having a lattice-work appearance and relatively large marrow spaces.
sutural b.’s See sutural bones, in Appendix II.
thigh b. See femur, in Appendix II.

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