Which lamellar structure in bone is described as interstitial lamellae?

Which lamellar structure in bone is described as interstitial lamellae?

• A. Center Laminae
• B. Interstitial lamellae
• C. Outer circumferential lamellae
• D. Concentric lamellae

Answer: (B)

The concept here is how bone organizes its mineralized layers, called lamellae. In dense (compact) bone, osteons form complete, circular units with concentric lamellae around a central canal. Between these osteons you’ll find interstitial lamellae—these are the leftover pieces of old osteons that have been partially resorbed during remodeling. They fit irregularly between neighboring osteons, not as complete rings, which is why they’re described as interstitial. Other lamellae types are complete concentric rings that build each osteon, or the circumferential lamellae that line the outer surface (and inner boundary) of the bone, rather than filling the spaces between osteons. Center laminae isn’t a standard term for this context.

The concept here is how bone organizes its mineralized layers, called lamellae. In dense (compact) bone, osteons form complete, circular units with concentric lamellae around a central canal. Between these osteons you’ll find interstitial lamellae—these are the leftover pieces of old osteons that have been partially resorbed during remodeling. They fit irregularly between neighboring osteons, not as complete rings, which is why they’re described as interstitial.

Other lamellae types are complete concentric rings that build each osteon, or the circumferential lamellae that line the outer surface (and inner boundary) of the bone, rather than filling the spaces between osteons. Center laminae isn’t a standard term for this context.