Which lamellae are remnants located between osteons?

Which lamellae are remnants located between osteons?

• A. Outer circumferential lamellae
• B. Interstitial lamellae
• C. Concentric lamellae
• D. Periosteum

Answer: (B)

In compact bone, each osteon is built from concentric lamellae around a central canal. When remodeling occurs, old osteons can be partially resorbed, and the remaining fragments of their lamellae sit between neighboring osteons. These leftover lamellae form irregular, incomplete rings in the spaces between osteons and are called interstitial lamellae. They reflect previous remodeling events rather than new, complete osteons. Outer circumferential lamellae wrap around the bone’s outer surface, not between osteons. Concentric lamellae are the circular layers inside an osteon. Periosteum is the outer membrane covering bone, not a lamellar type.

In compact bone, each osteon is built from concentric lamellae around a central canal. When remodeling occurs, old osteons can be partially resorbed, and the remaining fragments of their lamellae sit between neighboring osteons. These leftover lamellae form irregular, incomplete rings in the spaces between osteons and are called interstitial lamellae. They reflect previous remodeling events rather than new, complete osteons.

Outer circumferential lamellae wrap around the bone’s outer surface, not between osteons. Concentric lamellae are the circular layers inside an osteon. Periosteum is the outer membrane covering bone, not a lamellar type.