小柱　

WordNet

rod-shaped structures of fibrous tissue that divide an organ into parts (as in the penis) or stabilize the structure of an organ (as in the spleen)
stack in cords; "cord firewood"
a unit of amount of wood cut for burning; 128 cubic feet
a cut pile fabric with vertical ribs; usually made of cotton (同)corduroy
a light insulated conductor for household use (同)electric cord
a line made of twisted fibers or threads; "the bundle was tied with a cord"
bind or tie with a cord
of or relating to trabeculae (同)trabeculate
eye surgery that makes many tiny laser burns in an area that will increase the drainage of aqueous humor

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〈U〉〈C〉『綱,ひも』(stringより太くropeより細い) / 〈U〉〈C〉束縛,きずな / 〈C〉〈U〉(電気の)『コード』,線 / (またchord)〈C〉(動物体の)索状組織,腱(けん) / 〈C〉うね織り,(特に)コールテン;(うね織りの)うね;《複数形で》コールテンのズボン / 〈C〉コード(材木の容積の単位で約6.25m) / …'を'綱(ひも)で縛る

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/26 19:18:24」(JST)

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Alternation of trabecular pattern in the thigh bone reflects mechanical stress

Inside of a bone showing the trabecular structure

A trabecula (plural trabeculae, from Latin for "small beam") is a small, often microscopic, tissue element in the form of a small beam, strut or rod, generally having a mechanical function, and usually composed of dense collagenous tissue (such as the trabecula of the spleen.) They can be composed of other materials; in the heart, for example, muscles such as trabeculae carneae and septomarginal trabecula form similar structures. The formation of trabeculae is known as trabeculation.

On histological section, trabeculae of a cancellous bone can look like septa, but in three dimensions they are topologically distinct, with trabeculae being roughly rod or pillar-shaped and septa being sheet-like.

When crossing fluid-filled spaces, trabeculae may have the function of resisting tension (as in the penis, see for example trabeculae of corpora cavernosa and trabeculae of corpus spongiosum) or providing a cell filter (as in the trabecular meshwork of the eye.)

Multiple perforations in a septum may reduce it to a collection of trabeculae, as happens to the walls of some of the pulmonary alveoli in emphysema.

Etymology

Diminutive form of Latin trabs, which means a beam or bar. In the 19th century, the neologism trabeculum (with an assumed plural of trabecula) became popular, but is less etymologically correct. Trabeculum persists in some countries as a synonym for the trabecular meshwork of the eye, but this can be considered poor usage on the grounds of both etymology and descriptive accuracy.

Other uses

For the skull development component, see Trabecular cartilage.

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