Answer:
Haversian canals
Step-by-step explanation:
Osteoblasts are the cells which form a mature bone and the osteocyte cells which helps in the resorption and deposition in the cell. The osteocytes are also involved in calcium removal and help remove the skeletal deformations.
The outer side of the bone is connected with each the blood vessels and the nerves through which osteocytes are also connected is known as the Haversian canals. The Haversian canals are the tubes which are microscopic present in the bone.
Thus, Haversian canals are correct.