GENERAL HISTOLOGY

Detailed explanation-1: -Bone matrix Calcified bone contains about 25% organic matrix (2-5% of which are cells), 5% water and 70% inorganic mineral (hydroxyapatite).

Detailed explanation-2: -Sixty-five percent of the mass of bone is a compound called hydroxyapatite. All bones stop growing by the end of adolescense. An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone only. The trabeculae of spongy bone are oriented toward lines of stress.

Detailed explanation-3: -Bone is composed of 50 to 70% mineral, 20 to 40% organic matrix, 5 to 10% water, and <3% lipids.