Bone in filet near me

Also found in: Dictionary, Thesaurus, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia. See anatomic Table of Bone in filet near me in the Appendices for regional and alphabetical listings of bones, and see color plates 1 and 2. There are 206 separate bones in the human body.

Bones, ligaments, muscles, and tendons are the tissues of the body responsible for supporting and moving the body. Some bones have a chiefly protective function. An example is the skull, which encloses the brain, the back of the eyeball, and the inner ear. Some, such as the pelvis, are mainly supporting structures. Other bones, such as the jaw and the bones of the fingers, are concerned chiefly with movement. Bone is not uniform in structure but is composed of several layers of different materials.

The outermost layer, the periosteum, is a thin, tough membrane of fibrous tissue. It gives support to the tendons that secure the muscle to the bone and also serves as a protective sheath. This membrane encloses all bones completely except at the joints where there is a layer of cartilage. Beneath the periosteum lie the dense, hard layers of bone tissue called compact bone. Gradually, calcium phosphate collects in the cartilage, and it becomes harder and more brittle. Some of the cartilage cells break loose, so that channels develop in the bone shaft. Blood vessels enter the channels, bearing with them small cells of connective tissue, some of which become osteoblasts, cells that form true bone.

Cartilage formation and the subsequent replacement of cartilage by hard material is the mechanism by which bones grow in size. During the period of bone growth, cartilage grows over the hardened portion of bone. In time, this layer of cartilage hardens as calcium phosphate is added, and a fresh layer grows over it, and it too hardens. The process continues until the body reaches full growth.

In these diseases there is softening of the bones, due to inadequate concentration of calcium or phosphorus in the body. The usual cause is deficiency of vitamin D, which is required for utilization of calcium and phosphorus by the body. The condition usually is due to overactivity of the parathyroid glands. Although it is not common, it may occur in any of the bones of the body, and at any age. Some authorities also include the maxilla, zygomatic bone, and palatine bone.