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Encyclopedia > Nasolacrimal canal
Bone: Nasolacrimal canal
The lacrimal apparatus. Right side.
Tear system.

a = lacrimal gland
b = superior lacrimal punctum
c = superior lacrimal canal
d = lacrimal sac
e = inferior lacrimal punctum
f = inferior lacrimal canal
g = nasolacrimal canal
Latin canalis nasolacrimalis
Dorlands/Elsevier c_04/12208691

The canal containing the nasolacrimal duct is called the nasolacrimal canal. Image File history File links Tear_system. ... Lacrimal apparatus of the right eye. ... The lacrimal canaliculi, one in each eyelid, commence at minute orifices, termed puncta lacrimalia (or lacrimal punctum, or lacrimal point), on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. ... 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 papillæ lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. ... The lacrimal sac, or tear 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 maxilla. ... The lacrimal canaliculi, one in each eyelid, commence at minute orifices, termed puncta lacrimalia (or lacrimal punctum, or lacrimal point), on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. ... 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 papillæ lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo. ... The nasolacrimal duct carries tears from the lacrimal sac into the nasal cavity. ...


It is formed by indentations in the inferior nasal conchae, maxilla and lacrimal bone. The inferior nasal concha (Inferior Turbinated Bone) extends horizontally along the lateral wall of the nasal cavity [Fig. ... The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ...


See also

In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. ...

Additional images

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  Results from FactBites:
 
Eye Anatomy & Physiology - visionchannel (1059 words)
As the eyes blink, tears are forced through narrow channels into the lacrimal sac.
Once the muscles relax and the eye opens, the tears move from the sac to the nasolacrimal duct and into the nose.
Through the trabecular meshwork (collagen cords that form a spongelike, three-dimensional net) into the canal of Schlemm, which carries it into the venous system.
BIGpedia - Maxilla - Encyclopedia and Dictionary Online (2435 words)
At the lower part of this surface is a rounded eminence, the maxillary tuberosity, especially prominent after the growth of the wisdom tooth; it is rough on its lateral side for articulation with the pyramidal process of the palatine bone and in some cases articulates with the lateral pterygoid plate of the sphenoid.
On the posterior wall are the alveolar canals, transmitting the posterior superior alveolar vessels and nerves to the molar teeth.
The infraorbital canal usually projects into the cavity as a well-marked ridge extending from the roof to the anterior wall; additional ridges are sometimes seen in the posterior wall of the cavity, and are caused by the alveolar canals.
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