Diploë

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Diploë
Gray564.png
Veins of the diploë as displayed by the removal of the outer table of the skull.
Details
Latin diploe
Vein diploic veins
Identifiers
Gray's p.80
TA A02.1.00.035
FMA FMA:76630
Anatomical terminology

Diploë (/ˈdɪpli/) is the spongy bone structure (or tissue) of the internal part of short, irregular, and flat bones.

In the cranial bones, the layers of compact tissue are familiarly known as the tables of the skull; the outer one is thick and tough; the inner is thin, dense, and brittle, and hence is termed the vitreous table. The intervening cancellous tissue is called the diploë, and this, in certain regions of the skull, becomes absorbed so as to leave spaces filled with liquid between the two tables.

The diploe houses and protects the red bone marrow only found in hip bones, ribs, sternum, vertebrae, and ends of long bones, in adults. Its fluid-filled spaces reduce the weight of most bones, allowing them to be more easily moved and supported by skeletal muscles. It is similar to the medullary cavity in long bones.

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.