| Nasolacrimal duct | |
|---|---|
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| The lacrimal apparatus. Right side. | |
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| Outline of bones of face, showing position of air sinuses. | |
| Latin | d. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. nasolacrimalis |
| Gray's | subject #227 1029 |
| MeSH | Nasolacrimal+Duct |
| Dorlands/Elsevier | d_29/12314970 |
The nasolacrimal duct (sometimes called tear ducts) carries tears from the lacrimal sac into the nasal cavity. the Peripheral organs of the Special senses the organs of Taste ( Peripheral gustatory or Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group Tears are the liquid product of a process of lacrimation to clean and lubricate the Eyes The word lacrimation may also be used in a medical or literary sense The lacrimal sac is the upper dilated end of the Nasolacrimal duct, and is lodged in a deep groove formed by the Lacrimal bone and Frontal process of the The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face Excess tears flow through nasolacrimal duct which opens in the nose. Anatomically a nose is a protuberance in Vertebrates that houses the Nostrils or nares which admit and expel air for respiration in conjunction with the This is the reason the nose starts to run when a person is crying, or why you can sometimes taste eye drops.
Like the lacrimal sac, the duct is lined by stratified columnar epithelium containing mucus-secreting goblet cells, and is surrounded by connective tissue. Columnar epithelia are epithelial cells whose heights are at least four times their width Goblet cells are Glandular simple columnar epithelial cells whose sole function is to secrete Mucus.
Obstruction of the nasolacrimal duct leads to the excess overflow of tears called epiphora. Persons with dry eye conditions can be fitted with punctal plugs that seal the ducts to limit the amount of fluid drainage and retain moisture. A punctal plug (or punctual plug) is a small Medical device that is inserted into the tear duct (puncta of an Eye to block the duct
The canal containing the nasolacrimal duct is called the nasolacrimal canal. The canal containing the Nasolacrimal duct is called the nasolacrimal canal.
Additional images
 Roof, floor, and lateral wall of left nasal cavity. |
See also
External links
Congenital nasolacrimal duct obstruction (CLDO is literally a tear duct that has failed to open at the time of birth In Anatomy, the orbital bone is the cavity or socket of the Skull in which the Eye and its appendages are situated The lacrimal apparatus is the physiologic system containing the orbital structures for Tear production and drainage The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind Georgetown University is a Jesuit Private university located in Georgetown Washington DDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic