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The ear is an organ of the body that is used for hearing and balance. It is connected to the brain by the auditory nerve and is composed of three divisions, the external ear, the middle ear, and the inner ear. ...
The ear is looked upon as a miniature receiver, amplifier and signal-processing system. The structure of the outer ear catching sound waves as they move into the external auditory canal. ... This causes the round window to bulge outward into the middle ear. ...
The External or Outer Ear - comprises of the auricle or pinna which is the fleshy part of the outer ear. It is cup-shaped and collects and amplifies sound waves which then passes along the ear canal to the ear drum or tympanic membrane. ... These secrete ear wax or cerumen. Both the hairs and the cerumen help prevent dust and foreign objects from entering the ear. ...
The Middle Ear - is an air-filled narrow cavity or cleft that extends vertically for about 15 mm and the distance horizontally is about the same. ... The middle ear is separated from the outer ear by the eardrum and from the inner ear by a thin bony partition that contains two small membrane-covered openings. ... On the other side of the eardrum, embodies the mechanism for the conduction of sound waves to the internal ear. ...
The anterior wall of the middle ear consists of an opening which leads directly into the auditory tube. ...
This tube is made up of both bone and hyaline cartilage and connects to the middle ear with the nasopharynx which is the upper part of the throat. ... This allows the air to enter or leave the middle ear until the pressure in the middle ear equals the atmospheric pressure.
Approximate Word count = 1393
Approximate Pages = 5.6
(250 words per page double spaced)
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