In compact bone, the lamellae surrounding the central canal and osteon are called concentric lamellae.

In compact bone, the lamellae surrounding the central canal and osteon are called concentric lamellae.

• A. Osteons
• B. Interstitial lamellae
• C. Trabeculae
• D. Periosteum

Answer: (A)

Concentric lamellae are the circular layers of bone matrix that wrap around the central canal. They form the rings of an osteon, the cylindrical unit that makes up most of compact bone. The central canal houses vessels and nerves, and the surrounding lamellae together define the osteon. Interstitial lamellae are older lamellar remnants between osteons, not complete units around a canal; trabeculae are the lattice strands of spongy bone, and periosteum is the outer covering. So the structure described by concentric lamellae around a central canal is the osteon.

Concentric lamellae are the circular layers of bone matrix that wrap around the central canal. They form the rings of an osteon, the cylindrical unit that makes up most of compact bone. The central canal houses vessels and nerves, and the surrounding lamellae together define the osteon. Interstitial lamellae are older lamellar remnants between osteons, not complete units around a canal; trabeculae are the lattice strands of spongy bone, and periosteum is the outer covering. So the structure described by concentric lamellae around a central canal is the osteon.