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- A description of the human ear ..... The external ear consists of an expanded
- portion named pinna or auricle, and the auditory canal or meatus. The former
- serves to collect the vibrations of the air by which sound is produced, the
- latter conducts those vibrations to the tympanum. The pinna, or auricle, is
- of an ovoid form, with its larger end directed upward. Its outer surface is
- irregularly concave, directed slightly forward, and presents numerous
- eminences and depressions which result from the foldings of its fibro-
- cartilaginous element. To each of these, names have been assigned. Thus the
- external prominent rim of the auricle is called the helix. Another curved
- prominence, parallel with and in front of the helix, is called the antihelix.
-