Human Ear

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A diagram of the human ear. It is divided into the outer ear - A, middle ear - B, and inner ear - C. 1: ear trumpet or pinna, 2: outer ear passage with the drum that vibrates when sound waves hit it or the tympanum (3) across the inner ear, 4-5-6: the ear ossicles: hammer (malleus) anvil (incus) and stirrup (stapes) which transmit vibrations from the drum to the inner ear (they are also the smallest bones in the body), 7: the Eustachian tube, which connects to the mouth and through which air can indirectly enter, 8: largest chamber in the inner ear, called the utriculus, that has three semicircular canals, 9: the smallest chamber, called the sacculus, which is connected to the cochlea (10) which is the important hearing organ, 11: a “window” in the periotic bone, called the fenestra rotunda, 12: the endolymphatic duct.


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