Explain the mechanism of hearing in human beings.
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Mechanism of hearing:
The ear consists of three sections specializing in different functions. the outer ear consists of the pinna which focuses and collects sound waves into the ear tube (external auditory meatus); the sound waves cause the tympanic membrane (ear drum) to vibrate. In the middle ear, vibrations of the tympanic membrane are transmitted across to the membranous oval window by the movement of three ear ossicles (malleus, incus, stapes). A lever system between these bones and the relative area of contact of the malleus with the tympanic membrane and the stapes with the oval window amplifies the movement of the tympanic membrane. Finally there is the inner ear which consists of a complex system of canals and cavities with in the skull bone. Auditory receptors are found here which help in the conduction of message to the brain for interpretation
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sound waves enter the outer ear nd travel thru external auditory canal until they reach tymphanic membrane to cause ossicles and auditory canal to vibrate
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