Endosteum
Endosteum
Endosteum (pronounced: en-dos-tee-um) is a thin layer of connective tissue that lines the inner surface of the bony tissue that forms the medullary cavity of long bones.
Etymology
The term "Endosteum" is derived from the Greek words "endo", meaning "inside", and "osteon", meaning "bone".
Function
The primary function of the Endosteum is to provide a surface for the attachment of osteoclasts and osteoblasts, which are cells involved in the creation and destruction of bone tissue, respectively. It also plays a crucial role in the repair and remodeling of bones by housing bone marrow cells.
Structure
The Endosteum is composed of a single layer of osteoprogenitor cells and a small amount of connective tissue. It is thinner than the periosteum, the membrane that covers the outer surface of all bones except at the joints of long bones.
Related Terms
- Osteoclast: A type of bone cell that breaks down bone tissue.
- Osteoblast: A type of cell that synthesizes bone.
- Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
- Medullary Cavity: The central cavity of bone shafts where marrow is stored.
External links
- Medical encyclopedia article on Endosteum
- Wikipedia's article - Endosteum
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