Osseous ampullae
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| Osseous ampullae | ||
|---|---|---|
 | ||
| Inner ear illustration showing semicircular canal, hair cells, ampulla, cupula, vestibular nerve, & fluid | ||
| Latin | ampullae osseae | |
| Gray's | subject #232 1049 | |
| System | ||
| MeSH | [1] | |
| The membranous labyrinth. | ||
The bony semicircular canals are three in number, superior, posterior, and lateral, and are situated above and behind the vestibule. They are unequal in length, compressed from side to side, and each describes the greater part of a circle. Each measures about 0.8 mm. in diameter, and presents a dilatation at one end, called the osseous ampulla, which measures more than twice the diameter of the tube. They open into the vestibule by five orifices, one of the apertures being common to two of the canals.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
