Significant Series Windows/PCSIG-SignificantSeriesWindows-Win31.iso/0winrun/3332/medical.ttx

Text File | 1992-07-29 | 762b | 13 lines

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 fibrocartilaginous
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 to and in front of the helix, is called
the antihelix.