Table of Contents
What does periosteum consist of?
The periosteum is a complex structure composed of an outer fibrous layer that lends structural integrity and an inner cambium layer that possesses osteogenic potential. During growth and development it contributes to bone elongation and modeling, and when the bone is injured, participates in its recovery.
Does the periosteum contain osteoblasts and osteocytes?
The periosteum lines the outer surface of the diaphysis of the bone. It has a cellular inner layer, consisting of osteoblasts, and a fibrous outer layer. It contains osteoblasts and osteoclasts.
What types of cells are found in the periosteum and Endosteum?
Bone Cells and Tissue
| Bone Cells | ||
|---|---|---|
| Cell type | Function | Location |
| Osteoblasts | Bone formation | Growing portions of bone, including periosteum and endosteum |
| Osteocytes | Maintain mineral concentration of matrix | Entrapped in matrix |
| Osteoclasts | Bone resorption | Bone surfaces and at sites of old, injured, or unneeded bone |
What does the periosteum contain quizlet?
The fibrous periosteum is the outer layer furthest away from the bone. The cells in this layers are densely packed, and it contains lymphatics, blood vessels and nerve endings. The osteogenic periosteum is the inner layer that lies right on top of the bone.
Where are osteoclast cells found?
bone marrow
OSTEOCLASTS are large cells that dissolve the bone. They come from the bone marrow and are related to white blood cells. They are formed from two or more cells that fuse together, so the osteoclasts usually have more than one nucleus. They are found on the surface of the bone mineral next to the dissolving bone.
Which type of bone is adjacent to the periosteum?
Compact bone is the denser, stronger of the two types of osseous tissue (Figure 6.3. 6). It makes up the outer cortex of all bones and is in immediate contact with the periosteum. In long bones, as you move from the outer cortical compact bone to the inner medullary cavity, the bone transitions to spongy bone.
What kind of cells are in the periosteum?
The periosteum in the adult is composed of two layers, an outer fibrous covering of axially aligned collagen fibers that contains both fibroblasts and mesenchymal cells and is composed of type I, III, VI collagens, and elastin.
Where are the collagen fibers located in the periosteum?
Blood vessels supplying the periosteum hold a small caliber and branches in to supply the Haversian and Volkmann canals. Sharpey’s fibers, clusters of periosteal collagen fibers, protrude the bone matrix and bind the periosteum to the bone. These fibers exist more at the attachment of ligaments and tendons to bone.
What does inflammation of the periosteum look like?
Periostitis, inflammation of the periosteum, is a painful condition that may involve mild swelling and tenderness in the affected area.
Why are osteoblasts important to the periosteum?
Periosteum. The inner layer of the periosteum contains osteoblasts (bone-producing cells) and is most prominent in fetal life and early childhood, when bone formation is at its peak. In adulthood these cells are less evident, but they retain their functional capacities and are vital to the constant remodeling of bone that goes on throughout life.