Compact bone, found in the diaphysis in long bone, is organized from outer circumferential lamellae, inner circumferential lamellae, the Haversian systems, and interstitial lamellae. The bone is enveloped by a specialized dense connective tissue, periosteum. The outer circumferential lamellae are composed of several layers of lamellae that are parallel with the surface of the bone, located beneath the periosteum. The inner circumferential lamellae are collectively thinner than the outer circumferential lamellae and run alongside the marrow cavity, which is lined by endosteum. Between the outer and inner circumferential lamellae are the Haversian systems and interstitial lamellae. Haversian systems consist of concentric lamellae with a Haversian canal in the center. Interstitial lamellae are a kind of irregular lamellae left by Haversian systems destroyed during growth and remodeling of bone.