Haversian canal

The cells within the interior of the bone receive their nourishment from the small blood vessels in the Haversian canals.

The process may remain localised to the ossifying junction, but usually spreads along the medullary canal for a varying distance, and also extends to the periosteum by way of the enlarged Haversian canals.

In this case there is a formation of new bone in the connective tissue surrounding the vessels in the Haversian canals.

In fact, it is true bone, but lacks the Haversian canals.

The lacunæ are arranged in circles around larger tubes, termed from their discoverer, Haversian canals, which serve as passages for the blood vessels that nourish the bone.