Outer ear
Outer Ear
The Outer Ear (pronounced: /ˈaʊtər ɪər/) is the external part of the human auditory system. It is primarily responsible for collecting sound and directing it into the ear canal.
Etymology
The term "Outer Ear" is derived from the Old English words "ūt" meaning "out" and "ēare" meaning "ear".
Anatomy
The Outer Ear is composed of two main parts: the pinna (or auricle) and the ear canal (or external auditory meatus).
The Pinna (pronounced: /ˈpɪnə/) is the visible part of the ear that resides outside of the head. Its primary function is to collect sound, and includes the earlobe, helix, and tragus.
The Ear Canal (pronounced: /ɪər kəˈnæl/) is a tube running from the outer ear to the middle ear. The human ear canal extends from the pinna to the eardrum and is about 2.5 centimeters in length and 0.7 centimeters in diameter.
Function
The Outer Ear plays a crucial role in the process of hearing. It collects sound waves and funnels them into the ear canal, where they are amplified and sent to the middle ear. The shape of the outer ear also helps to determine the direction of sound.
Related Terms
- Middle Ear: The part of the ear that connects the outer ear to the inner ear.
- Inner Ear: The innermost part of the ear, responsible for sound detection and balance.
- Eardrum: A thin membrane that separates the outer ear from the middle ear.
- Audiology: The branch of science that studies hearing, balance, and related disorders.
External links
- Medical encyclopedia article on Outer ear
- Wikipedia's article - Outer ear
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