WordNet

soft decayed area in a tooth; progressive decay can lead to the death of a tooth (同)caries, dental_caries, tooth decay
space that is surrounded by something (同)enclosed space
(anatomy) a natural hollow or sinus within the body (同)bodily cavity, cavum
of or relating to the medulla of any body part
containing or consisting of or resembling bone marrow
of or relating to the medulla oblongata
the inner part of an organ or structure in plant or animal

PrepTutorEJDIC

へこみ,くぼみ,空洞 / 虫歯の穴 / (人体内の)腔(こう)
〈U〉骨髄 / =medulla oblongata

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/05/16 17:24:33」(JST)

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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; hence, the medullary cavity is also known as the 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]

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.

References

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

External links

"Medullary cavity" at Dorland's Medical Dictionary

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