Nasolacrimal duct
Nasolacrimal Duct
The Nasolacrimal Duct (pronunciation: /ˌneɪzoʊˈlækrɪməl/), also known as the tear duct, is a part of the human anatomy that is responsible for draining the tears from the eye to the nasal cavity.
Etymology
The term "Nasolacrimal Duct" is derived from the Latin words 'nasus' meaning 'nose', and 'lacrima' meaning 'tear'. Thus, it literally translates to 'the tear duct of the nose'.
Function
The primary function of the Nasolacrimal Duct is to carry tears from the lacrimal sac into the nasal cavity. This process helps in keeping the eyes moist and removing any debris that may have entered the eye.
Related Terms
- Lacrimal Apparatus: The collective term for the structures that produce and drain tears.
- Lacrimal Sac: The upper portion of the nasolacrimal duct, where tears from the eye collect before being drained into the nasal cavity.
- Dacryocystitis: An infection of the lacrimal sac, often caused by a blockage in the nasolacrimal duct.
Disorders
Blockage or infection of the Nasolacrimal Duct can lead to conditions such as Dacryocystitis and Epiphora (excessive tearing). Treatment for these conditions may include medication, surgery, or in some cases, the insertion of a Nasolacrimal Duct Stent.
External links
- Medical encyclopedia article on Nasolacrimal duct
- Wikipedia's article - Nasolacrimal duct
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