Description

The nasolacrimal duct is a membranous canal, about 18 mm. in length, which extends from the lower part of the lacrimal sac to the inferior meatus of the nose, where it ends by a somewhat expanded orifice, provided with an imperfect valve, the lacrimal fold (Hasneri), formed by a fold of the mucous membrane.

It is contained in an osseous canal, formed by the maxilla, the lacrimal bone, and the inferior nasal concha; it is narrower in the middle than at either end, and is directed downward, backward, and a little lateralward.

The mucous lining of the lacrimal sac and nasolacrimal duct is covered with columnar epithelium, which in places is ciliated.


Cette définition contient du texte provenant d'une édition publique de Gray's Anatomy (20eme édition Américaine de "Gray's Anatomy of the Human Body" publiée en 1918 - http://www.bartleby.com/107/).

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