Mastoid cells
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| Mastoid cells | |
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| Coronal section of right temporal bone. (Mastoid cells labeled at bottom left.) | |
| Latin | cellulae mastoideae |
| Gray's | subject #34 142 |
| Dorlands/Elsevier | c_19/12225682 |
A section of the mastoid process shows it to be hollowed out into a number of spaces, the mastoid cells, which exhibit the greatest possible variety as to their size and number.
At the upper and front part of the process they are large and irregular and contain air, but toward the lower part they diminish in size, while those at the apex of the process are frequently quite small and contain marrow; occasionally they are entirely absent, and the mastoid is then solid throughout.
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