What is the difference between periosteum and the endosteum?

The periosteum covers the outside of bones. The periosteum is a membrane that covers the outer surface of all bones, except at the articular surfaces (i.e. the parts within a joint space) of long bones. Endosteum lines the inner surface of the medullary cavity of all long bones.

Where does appositional growth of cartilage occur?

Appositional growth can occur at the endosteum or peristeum where osteoclasts resorb old bone that lines the medullary cavity, while osteoblasts produce new bone tissue.

What is appositional growth of cartilage?

Appositional growth occurs when chondroblasts secrete new matrix along existing surfaces and this causes the cartilage to expand and widen. In interstitial growth, chondrocytes secrete new matrix within the cartilage and this causes it to grow in length.

What is the function of endosteum and periosteum?

Periosteum and endosteum contain cells (osteoblasts, osteoclasts, and osteoprogenitor cells) required for bone development and remodeling of the bone. Understanding the histology of the endosteum and periosteum will help to decode the pathological conditions of bone.

What is endosteum and its function?

Endosteum is a soft, thin connective tissue that lines the inner cavity of long bones. It plays an important role in the healing of fractures by creating new cells necessary for the bone to fuse.

Is the endosteum inside or outside the periosteum?

Figure 6.32 – Periosteum and Endosteum: The periosteum forms the outer surface of bone, and the endosteum lines the medullary cavity.

What is the difference between appositional and interstitial growth?

The key difference between interstitial and appositional growth is that interstitial growth is the longitudinal growth of bone which increases the length of the bone while appositional growth is the bone growth which increases the diameter of the bone. Bones can grow.

What is chondroblasts and chondrocytes?

Chondroblasts are a type of immature cells whereas chondrocytes are a type of mature cells. The main difference between chondrocytes and chondroblasts is that chondroblasts secrete the extracellular matrix of the cartilage whereas chondrocytes are involved in the maintenance of the cartilage.

What is the endosteum function?

Endosteum consists of only a cellular layer, which contains bone lining cells, osteoblasts, and osteoprogenitor cells. Therefore, the main function of the endosteum is to help in the bone growth, repair, and remodelling. During a long period of malnutrition, endosteum is reabsorbed reducing the cortical thickness.

What is the endosteum and what does it consist of?

The endosteum (plural endostea) is a thin vascular membrane of connective tissue that lines the inner surface of the bony tissue that forms the medullary cavity of long bones. This endosteal surface is usually resorbed during long periods of malnutrition, resulting in less cortical thickness.