MICROANATOMY

Detailed explanation-1: -The periosteum is composed of two layers: The outer firm and a fibrous layer made up of collagen and reticular fibers and an inner proliferative cambial layer. The periosteum is identifiable on the outer surface of the bone; both layers of the periosteum can be differentiated.

Detailed explanation-2: -The periosteum covers external surfaces of most bones and is divided into two distinct layers-an outer fibrous and inner cellular layer (Figure 2F).

Detailed explanation-3: -The periosteum is a dense, fibrous connective tissue sheath that covers the bones. The outer layer, made up of collagen fibers oriented parallel to the bone, contains arteries, veins, lymphatics, and sensory nerves. The inner layer contains osteoblasts (i.e., cells that generate new bone formation).

Detailed explanation-4: -The outer layer of the periosteum is mostly made of elastic fibrous material, such as collagen. It also contains blood vessels and nerves. The blood vessels of the periosteum contribute to the blood supply of the body’s bones. They can pass into the dense and compact layer of bone tissue below, called the bone cortex.