Final answer:
True. The bone building cells of the periosteum lay down bone in concentric circles to fill in the tunnel around a blood vessel. This process is called bone remodeling and helps to strengthen and repair bones.
Step-by-step explanation:
True. Once a tunnel of bone is formed around a blood vessel, the bone building cells of the periosteum lay down bone in concentric circles that fill in the tunnel. This process is called bone remodeling and helps to strengthen and repair bones. The periosteum is a fibrous membrane that covers the outer surface of bones and contains blood vessels, nerves, and lymphatic vessels that nourish the bone tissue.11