Choana
Choana
Choana (pronunciation: ko-ah-na) is a term used in anatomy to refer to the posterior nasal apertures that connect the nasal cavity to the nasopharynx. The term is derived from the Greek word 'choanē', meaning 'funnel'.
Etymology
The term 'choana' is derived from the Greek word 'choanē', which translates to 'funnel'. This is in reference to the funnel-like structure of the choanae.
Anatomy
The choanae are two openings found at the back of the nasal cavity. They serve as a connection between the nasal cavity and the nasopharynx, allowing for the passage of air from the nose to the lungs via the trachea. Each choana is surrounded by various anatomical structures, including the vomer, the sphenoid bone, and the palatine bone.
Related Terms
- Nasal cavity: The space within the nose where air passes and is warmed and humidified before reaching the lungs.
- Nasopharynx: The upper part of the throat that connects the nasal cavity to the mouth and the esophagus.
- Vomer: A thin, flat bone that forms part of the nasal septum.
- Sphenoid bone: A butterfly-shaped bone at the base of the skull that forms part of the eye socket and the nasal cavity.
- Palatine bone: One of a pair of bones that form part of the hard palate of the mouth, the nasal cavity, and the eye socket.
External links
- Medical encyclopedia article on Choana
- Wikipedia's article - Choana
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