The spike External spike heel centre of attention pinna Internal ear By Dr Ahmad Dalbah External Ear The orthogonal ear has an auricle and an external auditive meatus. The auricle ( penna) : collects pains vibrations. External Ear The external auditory meatus is a turn tube. The framework of the outer third of the meatus is elastic cartilage, and the intimate 2 thirds is os, formed by the tympanic plate of the lay bone 2-3 cm AUDITORY MEATUS cerumen (wax) is produced in the outer 2/3 and is a bactericidal which aids in the killing mechanism along with epithelial migration The hairs and the wax provide a sticky barrier that prevents the entrance of foreign bodies External Ear The afferent typeface supply from the auriculotemporal nerve and the great auricle nerve ( to posterior find). The lymph drainage is to the superficial parotid, mastoid bone, and superficial cervical lymph nodes. center of attention Ear The tympanic membrane is a thin, semitransparent, fibrous membrane that is helicopter gray. The membrane is obliquely placed, lining downward, forward, and laterally. It is concave laterally, small depression, the umbo, produced by the tip of the handle of the malleus. The tympanic membrane is about 1 cm in diameter. affection Ear, tympanic membrane The tympanic membrane is extremely sharp to pain and is innervated on its outer step forward by the auriculotemporal nerve and the auricular branch The internal surface of the tympanic membrane is supplied by the glossopharyngeal nerve (CN IX). tympanic tissue layer Examination BY Otoscopic Otitis media Perforation of tympanic membrane Middle ear The dental caries of the center ear is the narrow air-filled house in the petrous part of the temporal bone. The tympanic cavity is lined with mucous membrane that is continuous with the lining of the pharyngotympanic tube, mastoid cells, and mastoid antru m. Middle ear The contents of the midd! le ear are the: ...If you want to place a full essay, edict it on our website: OrderCustomPaper.com
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