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auricle 
Soft cartilaginous outer portion of the ear located at the side of the head; it allows sounds to be collected.
earlobe 
Fleshy extension of the lower section of the auricle; it plays no role in hearing.
acoustic meatus 
Opening through which sounds collected by the auricle reach the tympanic cavity.
tragus 
Flat triangular protuberance located in front of the acoustic meatus, protecting especially the concha.
anterior notch 
Deep depression separating the helix from the tragus.
crus of helix 
Front portion of the helix beginning at the base of the concha.
triangular fossa 
Small depression located in the upper portion of the helix between its two branches.
tail of helix 
Terminal end of the helix extending to the upper portion of the lobe.
antitragus 
Small triangular protuberance at the terminal end of the antihelix.
intertragic notch 
Deep depression at the base of the acoustic meatus between the antitragus and the tragus.
concha 
Deep cavity of the auricle of the ear above the antitragus; the acoustic meatus opens into it.
antihelix 
Protuberance parallel to and inside the helix dividing into two branches in its upper section.
helix 
Protruding fold of the auricle of the ear extending from the concha to the lobe.