Pinna
Pinna
Pinna (/ˈpɪnə/), also known as the auricle or external ear, is a term used in anatomy to refer to the visible part of the ear that resides outside of the head.
Etymology
The term "pinna" is derived from the Latin word for "feather", due to the resemblance of the ear's shape to that of a bird's wing. The term "auricle" is derived from the Latin "auricula", meaning "little ear".
Anatomy
The pinna is composed of a thin plate of yellow elastic cartilage covered with integument, and is connected to the surrounding parts by ligaments and muscles; and to the ear drum or tympanic membrane by a narrow tube, the external auditory meatus. The pinna's main function is to collect sound, and perform transformations to it that enable it to be received and understood by the auditory system.
Related Terms
- Helix (ear): The rim of the pinna.
- Lobule (ear): The lower part of the pinna.
- Tragus (ear): A small pointed eminence of the external ear, situated in front of the concha, and projecting backward over the meatus.
- Antitragus: A small tubercle opposite the tragus, at the base of the concha.
- Concha (ear): The deepest indentation of the pinna, leading directly to the ear canal.
See Also
External links
- Medical encyclopedia article on Pinna
- Wikipedia's article - Pinna
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