WordNet

a continuous tube formed by a row of elongated cells lacking intervening end walls
an enclosed conduit for a fluid
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snakes fangs" (同)epithelial duct, canal, channel
relating to or located near the organ that produces tears (同)lachrymal
of or relating to tears (同)lachrymal

PrepTutorEJDIC

送水管;(建物・船などの)通気管;(地下ケーブルなどの)ダクト / (体液を運ぶ)導管,(植物が水・空気を運ぶ)導管
=lachrymal / 涙腺(るいせん)の近くにある

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/04/03 00:07:48」(JST)

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The lacrimal canaliculi, also known as the lacrimal canals or lacrimal ducts, are the small channels in each eyelid that commence at minute orifices, termed puncta lacrimalia, on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis.

The superior duct, the smaller and shorter of the two, at first ascends, and then bends at an acute angle, and passes medialward and downward to the lacrimal sac.

The inferior duct at first descends, and then runs almost horizontally to the lacrimal sac.

At the angles they are dilated into ampullæ. Able to be seen under microscope, they are lined by nonkeratinizing stratified squamous epithelium surrounded by fibrous tissue.

Outside the latter is a layer of striped muscle, continuous with the lacrimal part of the Orbicularis oculi; at the base of each lacrimal papilla, the muscular fibers are circularly arranged and form a kind of sphincter.

Clinical significance[edit]

Canaliculitis is an inflammation of the canaliculus.^[1]

References[edit]

^ Handbook of Ocular Disease Management - Molluscum Contagiosum

External links[edit]

lacrimal+canaliculus at eMedicine Dictionary

This article incorporates text from a public domain edition of Gray's Anatomy.

This article about the eye is a stub. You can help Wikipedia by expanding it.

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1. 小児における鼻涙管閉塞（涙管閉鎖症） nasolacrimal duct obstruction dacryostenosis in children
2. 持続性の流涙がみられる小児に対するアプローチ approach to the child with persistent tearing
3. まぶた裂傷 eyelid lacerations
4. 鼻の先天異常 congenital anomalies of the nose
5. 顔面裂傷の評価およびマネージメント assessment and management of facial lacerations

English Journal

Primary endoscopic endonasal dacryocystorhinostomy for pediatric nasolacrimal duct obstruction: A systematic review.

Saniasiaya J, Abdullah B, Husain S, Wang Y, Wan Mohammad Z.
American journal of rhinology & allergy.Am J Rhinol Allergy.2017 Sep 1;31(5):328-333. doi: 10.2500/ajra.2017.31.4464.
BACKGROUND: Epiphora secondary to nasolacrimal duct obstruction is common in the pediatric age group. The mainstay treatment among these young patients has been conservative. Once epiphora becomes recalcitrant, however, an external or an endonasal approach is considered.OBJECTIVE: Endoscopic dacryoc
PMID 28859711

A novel treatment for keratitis sicca (Dry eye): Anatomical feasibility study.

Iwanaga J1,2,3, Watanabe K2, Kusukawa J3, Fisahn C1,4, Alonso F4, Oskouian RJ1,4, Tubbs RS1,5.
Clinical anatomy (New York, N.Y.).Clin Anat.2017 Sep;30(6):839-843. doi: 10.1002/ca.22946. Epub 2017 Jul 6.
PMID 28631333