Bones

A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the organs of the body, produce red and white blood cells, store minerals, help regulate acid-base homeostasis, provide structure and support for the body, and enable mobility and hearing. Bones come in a variety of shapes and sizes and have complex internal and external structures.

The clavicle, collarbone, or keybone is a slender, S-shaped long bone approximately long that serves as a strut between the shoulder blade and the sternum (breastbone). There are two clavicles, one on each side of the body. The clavicle is the only long bone in the body that lies horizontally. Together with the shoulder blade, it makes up the shoulder girdle. It receives its name from Latin clavicula 'little key' because the bone rotates along its axis like a key when the shoulder is abducted. The clavicle is the most commonly broken bone. It can easily be fractured by impacts to the shoulder

amount of bone mineral in bone tissue

An exostosis ( exostoses) is a benign (non-cancerous) new growth projecting from the surface of a bone, informally known as a bone spur. Exostoses can cause chronic pain ranging from mild to severe, depending on the shape, size, and location of the lesion, though most are asymptomatic and are found by chance on plain x-ray taken for other reasons. Occasionally, an exostosis can be potentially life-threatening.

hard outer layer of a bone, protecting the bone and the spongey layer, as well as bone marrow

thumb|250px|Crocodile|Crocodiles are among the few modern animals with gastralia 250px|thumb|Tyrannosaurus gastralia Gastralia (: gastralium) are dermal bones found in the ventral body wall of modern crocodilians and tuatara, and many prehistoric tetrapods. They are found between the sternum and pelvis (collectively forming the gastral basket), and do not articulate with the vertebrae. In these reptiles, gastralia provide support for the abdomen and attachment sites for abdominal muscles. thumb|Diagram of the dinosaur Torvosaurus, with the gastral basket labelled "20" The possession of gastra

medical device used to support a person's neck

In histology, osteoid is the unmineralized, organic portion of the bone matrix that forms prior to the maturation of bone tissue. Osteoblasts begin the process of forming bone tissue by secreting the osteoid as several specific proteins. The osteoid and its adjacent bone cells have developed into new bone tissue when it becomes mineralized.

unpleasant sensation characterized by physical discomfort (such as pricking, throbbing, or aching) localized to bone

Vision in chapter 37 of the Book of Ezekiel

continuous turnover of bone matrix and mineral

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dermal bone situated between the parietal and supraoccipital

healing from bone injury

device limiting motion of the spine

Burial ritual in parts of East Asia

Additional bone found in some people

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chemical compound