ABSTRACT
Bone is a highly organized and specialized support tissue that is characterized by its rigidity, porosity, and hardness. It is a connective tissue with both cellular and extracellular matrix composed of extracellular fibers and a dense crystalline material. Impregnated with inorganic salts, bone contains mainly salts of calcium such as calcium phosphate, calcium carbonate, etc. The inorganic portion occupies two-thirds of the bone and the organic salt component constitutes the rest. Inorganic salts are mainly responsible for the rigidity and hardness that allow bone to resist compression caused by the forces of weight and impact. The organic connective tissue of bone makes it resilient, thus affording resistance to tensile forces. Bones support and protect various organs of the body, produce red and white blood cells, and store minerals.
