COMPACT BONE:
• Compact (dense) bone tissue consists of precise arrangements of microscopic cylindrical structures called osteons. The matrix and osteocytes of osteon are laid down in concentric rings around a central (Haversian) canal.
• Compact bone tissue forms the external layer of all bones and the bulk of the diaphyses (shaft) of the long bones.
• It provides protection and support and helps the long bones resist the stress of weight placed on them.