Human ear

The function of the ears also includes controlling balance. Balance is ensured by the sense of position and rotation in the ears. The two atrial sacs in the  ear  each contain a position-sensing organ. When the head is tilted, the sensory hairs are bent by the gelatinous plates and the sensory cells are thus stimulated. The brain controls the position of the head from this pattern of excitation of the position-sensing organs. The semicircular canals in the ear are organs of rotation. These pass on the information about the movements of the body to the human brain and ensure compensatory movements. Another  function of the ears is for listening. The eardrum in the middle ear is connected to the ossicles malleus, stapes and incus. These ensure the transmission of the sound waves to the inner ear and the cochlea located there. The associated sensory cells transmit the stimuli to the auditory nerve.

Ear impairments can be caused by volume,  stress  or excessive hygiene. From 80 decibels, permanent damage to the hearing organ is possible with longer exposure: High sound pressure destroys the hearing cells. These cannot regenerate, so the damage is permanent and cannot be healed. The consequences range from  tinnitus  and  hearing loss  to deafness. The first signs may be  pressure in the ear  or the feeling that the  ears  are closed.

 

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