Middle auditory ossicles, anvil-shaped bone Passage between the middle ear and the nasopharynx (paired, one right and one left)Įqualizes the pressure of the middle ear with external air pressure (ear popping) The base of the stapes covers the oval window which allows sound waves to pass from the tympanic membrane, into the cochlea of the inner ear. The auditory ossicles inward from the tympanic membrane, are the malleus, incus, and stapes. The main structures of the middle ear are the auditory ossicles, Eustachian tube (also known as the pharyngotympanic tube), oval window and round window. Paired (right and left) membranes in the external auditory canal separating the outer ear from the middle earĮar drum sound causes vibration of the tympanic membrane vibrations of the tympanic membrane are transferred to the middle ear and then ultimately the inner ear for detection of sound Passageway carrying sound collected by the auricle to the middle ear Paired (right and left) skin-covered canal positioned within the external acoustic meatus (sometimes used synonymously with external acoustic meatus) Paired (right and left) canal in the bone of the skull, specifically the temporal boneĬreates passage within the skull for the external auditory canal Produce and secrete cerumen (ear wax) cerumen lubricates the external auditory canal and is antibacterial Located under the skin along the external auditory canal Paired (right and left) external ear structure composed of elastic cartilage and skinĬollecting sound and funneling it into the external auditory canal Elastic cartilage and the temporal bone form the support for the auricle. Additionally, ceruminous glands, specialized coiled, tubular, apocrine sweat glands, secret cerumen, a waxy secretion. Thin skin covering the external acoustic meatus possesses small dermal papillae and epithelial pegs to anchor the epidermis with the dermis. Numerous hair follicles with their accompanying sebaceous glands are also present. Skeletal muscle fibers of the auricular muscle have little, but variable, function in humans. The auricle or pinna (external ear) consists of a core of elastic cartilage covered by thin skin.
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