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The nasolacrimal duct (sometimes called tear duct) carries tears from the lacrimal sac into the nasal cavity. Excess tears flow through nasolacrimal duct which opens in the nose. This is the reason the nose starts to run when a person is crying or has watery eyes from an allergy, and why one 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. Obstruction of the nasolacrimal duct leads to the excess overflow of tears called epiphora. A congenital obstruction can cause cystic expansion of the duct and is called a dacrocystocele or Timo cyst. 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. The canal containing the nasolacrimal duct is called the nasolacrimal canal. Additional imagesRoof, floor, and lateral wall of left nasal cavity. Miscellaneous Information The nasolacrimal duct drains into the inferior meatus of the nasal bone. From Wikipedia under the
GNU Free Documentation License  craveonline.com Mon, 05 Jul 2010 23:25:12 GMT+00:00 Crave Online To engage in the latter would be to flirt with devastation, a raw truth so haunting, tragic and bare that the tear ducts become inevitably involved by the ...  scienceblogs.com Tue, 13 Jul 2010 03:43:50 GMT+00:00 ScienceBlogs (blog) Or, you can do this, and I promise you it works: Get a piece of duct tape, and cover the gap with it. The gap, covered with duct tape, becomes a none issue ... Evolution, Life Sciences, Science Education, Human Evolution, and Stuff ScienceBlogs (blog)  snovalleystar.com Wed, 30 Jun 2010 23:28:11 GMT+00:00 SnoValley Star Walking around Si View Park's community center and fields, it's easy to see the wear and tear . The facilities have been maintained with duct tape and ... From Google News Search: "nasolacrimal duct"  newborns.stanford.edu 340px x 545px | 36.30kB [source page] Dacrostenosis photo by Janelle Aby MD This is the appearance of dacrostenosis blocked tear duct without dacrocystocele When tears cannot pass through the nasolacrimal duct the  newborns.stanford.edu 333px x 350px | 17.00kB [source page] Dacrocystocele photo by Anna Messner MD An intra operative photo shows the degree of obstruction of the nasal passage on the right side The pink structure on the upper left is the turbinate From Yahoo Image Search: "nasolacrimal duct" |
