the organ located on the dis of the head that receives sound vibrations and channels them to the tympanic membrane
consists of pinna and external acoustic meatus
pinna
also called auricle; the flexible structure supported by the auricular cartilage
auricular concha
the hollow of the ear, which is incompletely divided by the crus of the helix
cartilaginous external acoustic meatus
lines the external acoustic meatus of the temporal bone
conducts sound vibrations from the auricle to the middle ear
cerumen
earwax; keeps tympani membrane pliable
middle ear
consists of tympanic membrane, the air-filled tympanic cavity, and the auditory tube
tympanic membrane 3 layers
skin (externally); conn. t.p.; and mucous membrane (deep side)
wall which separates tympanic cavity from inner ear
labyrinthine wall of tympanic cavity; two openings: oval-shaped vestibular window of the temporalboneand round-shaped cochlear window of the temporal bone
wall in tympanic cavity which opens into auditory tube
carotid wall
the opening into the pharynx (by the auditory tube)
pharyngeal opening of auditory tube
tensor tympani m.
dampens vibrations of excessive amplitude to protect the delicate structures of the inner ear from damage
origin: cartilaginous part of auditory tube
insertion: malleus
osseous labyrinth of the temporal bone vs. membranous labyrinth
the osseous labyrinth of the temporal bone is a set of BONY CHANNELS within the pertrous part of temporal bone (NOT PART OF EAR)
the membranous labyrinth are the components of the inner ear which are WITHIN the osseous labyrinth