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The medullary cavity (medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored (which is why medullary cavity is also known as marrow cavity). Located in the main shaft (cortical bone) of a long bone (diaphysis) (consisting mostly of compact bone), the medullary cavity has walls composed of spongy bone (cancellous bone) and is lined with a thin, vascular membrane (endosteum). However, the medullary cavity is the area inside any bone (long, flat, etc.) that holds the bone marrow.[1] The clavicle is the only long bone that does not contain a medullary cavity.

This area is involved in the formation of red blood cells and white blood cells.

Intramedullary is a medical term meaning the inside of a bone. Examples include intramedullary rods used to treat bone fractures in orthopedic surgery and intramedullary tumors occurring in some forms of cancer or benign tumors such as an enchondroma.

See also

References

  1. ^ Martini F., & Nath J. L. (2009). Fundamentals of Anatomy and Physiology 8e. San Francisco, CA: Pearson Education Inc.

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