Template:X-Ray (Newsletter)
From Tempebrennan
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| colspan="2"| [[Image:Science1.jpg|thumb|100px|Bone cartilege]] | | colspan="2"| [[Image:Science1.jpg|thumb|100px|Bone cartilege]] | ||
...an article by Iain Barnwell | ...an article by Iain Barnwell | ||
- | + | As we grow older, our bones begin to harden. | |
- | begins to appear surrounded by the uncalcified matrix. | + | This is known as ossification. A soft material called |
- | calcified matrix becomes the primary ossification centre. | + | hyaline cartilage forms the initial bone structure. |
+ | Then half way down the shaft (diaphysis) of long bone | ||
+ | cartilage, a calcified (formed by calcium) matrix | ||
+ | begins to appear surrounded by the uncalcified matrix. | ||
+ | This calcified matrix becomes the primary ossification centre. | ||
Once ossified, the arteries and veins form inside a space | Once ossified, the arteries and veins form inside a space | ||
called the medullary cavity. These supply the bone with its | called the medullary cavity. These supply the bone with its |
Revision as of 01:00, 17 November 2007