Final answer:
Outer Circumferential lamellae are layers of bone tissue that provide structural support, while Sharpe's fibers anchor the periosteum to the bone.
Step-by-step explanation:
Outer Circumferential lamellae are layers of bone tissue that are found in the outer region of compact bone. They are arranged parallel to the surface of the bone and help to provide structural support and strength. Sharpe's fibers, also known as perforating fibers, are collagenous fibers that extend from the periosteum into the bone matrix, helping to anchor the periosteum to the bone.