Diaphysis

Changed by Jeremy Jones, 1 Feb 2016

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The diaphysis is the main portion (shaft) of a long bone (a bone that is longer than it is wide).

~~Structure~~

The diaphysis has a tubular composition with:

a hard outer section of hard cortical bone
and central portion with cancellous bone and bone marrow cavity

It is formed by primary ossification (endochondral ossification) before longitudinal growth continues with secondary ossification at the physis.

-The diaphysis is the main portion (shaft) of a <a title="long bone" href="/articles/long-bone">long bone</a> (a bone that is longer than it is wide). <h4>Structure</h4>The diaphysis has a tubular composition with:<ul>
~~-<li>hard outer section of hard <a title="cortical bone" href="/articles/cortical-bone">cortical bone</a>~~
~~-</li>~~
~~-<li>central portion with <a title="cancellous bone" href="/articles/cancellous-bone">cancellous bone</a> and <a title="bone marrow cavity" href="/articles/bone-marrow-cavity">bone marrow cavity</a>~~
~~-</li>~~
-</ul>It is formed by <a title="primary ossification" href="/articles/primary-ossification">primary ossification</a> (<a title="endochondral ossification" href="/articles/endochondral-ossification">endochondral ossification</a>) before longitudinal growth continues with <a title="secondary ossification" href="/articles/secondary-ossification">secondary ossification</a> at the <a title="physis" href="/articles/physis">physis</a>.
+The diaphysis is the main portion (shaft) of a <a href="/articles/long-bones">long bone</a> (a bone that is longer than it is wide). The diaphysis has a tubular composition with a hard outer section of hard <a href="/articles/cortical-bone">cortical bone</a> and central portion with <a href="/articles/cancellous-bone">cancellous bone</a> and <a href="/articles/bone-marrow-cavity">bone marrow cavity</a>.It is formed by <a href="/articles/primary-ossification">primary ossification</a> (<a href="/articles/endochondral-ossification">endochondral ossification</a>) before longitudinal growth continues with <a href="/articles/secondary-ossification">secondary ossification</a> at the <a href="/articles/physis">physis</a>.