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Axial(II) - The Skull Cranium 8 cranial bones o Brain case...

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The Skull 22/02/2008 09:53:00 Cranium 8 cranial bones o Brain case Calvarium- Roof of skull Frontal bone Most anterior Parietal bones Paired Inferior to frontal Occipital bone Most inferior Occipital condoles Foramen magnum Temporal bones Paired External auditory meatus Mastoid process Styloid process o Derived from ‘stylus’ o Attachment point for muscles
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Mandibular fossa o Indentation where mandible sits Zygomatic process of the temporal bone o Attaches bone to Zygomatic bone Sphenoid Butterly shaped bone o Sella tursica ‘Turkish saddle’ Petuitary gland sits o Optic canals Openings for the optic nerve Base of cranium Ethmoid bone Behind nose Forms part of cranial floor o Crista galli Pointy protrusion of ethmoid bone Anchor point for brain meningies o Superior nasal concha Cause turbulence inside nose Warms and humidifies
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Difficult to see Impossible from frontal view o Middle nasal concha Cause turbulence inside nose Warms and humidifies o Perpendicular plate Inferior extension Makes part of nasal septum Splits nostrils o Curbiform plate o Olfactory foramina Holes in curbiform plate Olfactory nerves
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