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====Middle Ear====

===Middle Ear===

[[Image:Middle Ear.jpg|thumb|right|150px|Middle Ear - Copyright David Bainbridge]]

[[Image:Middle Ear.jpg|thumb|right|150px|Middle Ear - Copyright David Bainbridge]]

The middle ear consists of the '''tympanic cavity''', the '''auditory ossicles''' and the '''eustachian tube'''. The boundary between the middle and inner ear is the '''oval window'''.  The auditory ossicles are attached to the wall of the tympanic cavity by many ligaments and mucosal folds. The tympanic cavity is located within the petrous temporal bone, and can be divided into dorsal, middle and ventral parts:

The middle ear consists of the '''tympanic cavity''', the '''auditory ossicles''' and the '''eustachian tube'''. The boundary between the middle and inner ear is the '''oval window'''.  The auditory ossicles are attached to the wall of the tympanic cavity by many ligaments and mucosal folds. The tympanic cavity is located within the petrous temporal bone, and can be divided into dorsal, middle and ventral parts:

The eustachian tube connects the tympanic cavity to the nasopharynx, which mark the beginning and end of the eustachian tube, respectively. The eustachian tube functions to equalise pressure on either side of the tympanic cavity, by opening while yawning or swallowing, for example. In the horse, the [[Equine Upper Respiratory Tract - Horse Anatomy#Guttural Pouches|guttural pouch]] is a paired diverticulum of the eustacian tube that is unique to this species. This is of clinical importance.

The eustachian tube connects the tympanic cavity to the nasopharynx, which mark the beginning and end of the eustachian tube, respectively. The eustachian tube functions to equalise pressure on either side of the tympanic cavity, by opening while yawning or swallowing, for example. In the horse, the [[Equine Upper Respiratory Tract - Horse Anatomy#Guttural Pouches|guttural pouch]] is a paired diverticulum of the eustacian tube that is unique to this species. This is of clinical importance.

====Inner Ear====

===Inner Ear===

[[Image:Inner, Membranous Labyrinth.jpg|thumb|right|150px|Inner, Membranous Labyrinth - Copyright David Bainbridge]]

[[Image:Inner, Membranous Labyrinth.jpg|thumb|right|150px|Inner, Membranous Labyrinth - Copyright David Bainbridge]]