bones are composed of
Bone is composed of 1/3 organic matter and 2/3 inorganic matter. The organic matter includes bone cells (osteoblasts, osteocytes, and osteoclasts) and osteoids. The inorganic â¦ portion is made up of minerals, calcium and phosphorous ions, and hydroxiapatite crystals.ones are made by a process known as ossification. Cells called osteoblasts lay down a cartilage template that gets filled with calcium and phosphorus in the area between the cells called the extracellular matrix.