On the basis of texture, bones may be compact or spongy
(i) Compact bone It has lamellae arranged in regular Haversian systems without gap between them. It is comparatively hard and compact. Compact hones are found in the shaft of long bone. Its cavity contains yellow bone marrow.
(ii) Spongy bone It has lamellae, called trabeculae that forms interlacing network with small spaces between them. These spaces contain red bone marrow. The spongy bones are without Haversian systems. This bone form expanded ends of long bones, vertebrae, ribs, skull bones.