lacrimal duct


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Related to lacrimal duct: Lacrimal Duct Obstruction

duct

 [dukt]
a passage with well-defined walls, especially a tubular structure for the passage of excretions or secretions. adj., adj ductal.
accessory duct of Santorini a tubular structure that drains the lower part of the head of the pancreas.
alveolar d's small passages connecting the respiratory bronchioles and the alveolar sacs.
Bartholin's duct (duct of Bartholin) the larger and longer of the sublingual ducts.
bile d's (biliary d's) see bile ducts.
cochlear duct a spiral membranous tube in the bony canal of the cochlea between Reissner's membrane and the basilar membrane; it is divided into the scala tympani, scala vestibuli, and spiral lamina. Called also scala media.
common bile duct a duct formed by the union of the cystic and hepatic ducts; see also bile ducts.
cystic duct the passage connecting the gallbladder neck and the common bile duct.
efferent duct any duct that gives outlet to a glandular secretion.
ejaculatory duct the duct formed by union of the ductus deferens and the duct of the seminal vesicles, opening into the prostatic urethra on the colliculus seminalis.
endolymphatic duct a canal connecting the membranous labyrinth of the ear with the endolymphatic sac.
excretory duct one through which the secretion is conveyed from a gland.
hepatic duct the excretory duct of the liver, or one of its branches in the lobes of the liver; see also bile ducts.
Hepatic duct. From Applegate, 2000.
lacrimal duct the excretory duct of the lacrimal gland; see also lacrimal apparatus. Called also lacrimal canaliculus.
lacrimonasal duct nasal duct.
lactiferous d's ducts conveying the milk secreted by the lobes of the breast to and through the nipples.
lymphatic duct, left thoracic duct.
lymphatic d's see lymphatic ducts.
mammary duct lactiferous ducts.
mesonephric duct an embryonic duct of the mesonephros, which in the male becomes the epididymis, ductus deferens and its ampulla, seminal vesicles, and ejaculatory duct, and in the female is largely obliterated.
müllerian duct either of the two paired embryonic ducts developing into the vagina, uterus, and fallopian tubes, and becoming largely obliterated in the male.
nasal duct (nasolacrimal duct) the downward continuation of the lacrimal sac, opening on the lateral wall of the inferior meatus of the nose; see also lacrimal apparatus.
pancreatic duct the main excretory duct of the pancreas, which usually unites with the common bile duct before entering the duodenum at the major duodenal papilla; see also bile ducts.
papillary d's straight excretory or collecting portions of the renal tubules, which descend through the renal medulla to a renal papilla.
paramesonephric duct müllerian duct.
paraurethral d's Skene's glands.
parotid duct the duct by which the parotid glands empty into the mouth.
prostatic d's minute ducts from the prostate, opening into or near the prostatic sinuses on the posterior wall of the urethra.
lymphatic duct, right a vessel draining lymph from the upper right side of the body, receiving lymph from the right subclavian, jugular, and mediastinal trunks when those vessels do not open independently into the right brachiocephalic vein.
salivary d's the ducts of the salivary glands.
semicircular d's the long ducts of the membranous labyrinth of the ear.
seminal d's the passages for conveyance of spermatozoa and semen.
sublingual d's the excretory ducts of the sublingual salivary glands.
submandibular duct (submaxillary duct) the duct that drains the submandibular gland and opens at the sublingual caruncle.
tear duct lacrimal duct.
thoracic duct a duct beginning in the cisterna chyli and emptying into the venous system at the junction of the left subclavian and left internal jugular veins. It acts as a channel for the collection of lymph from the portions of the body below the diaphragm and from the left side of the body above the diaphragm.

Lacrimal duct

A short canal leading from a small orifice at the medial angle of each eyelid to the lacrimal sac.

tear duct 

One of about a dozen ducts of the lacrimal gland. It originates in the orbital part of the gland, traverses the palpebral part of the gland and opens into the lateral superior fornix of the conjunctival sac. Syn. lacrimal duct. See lacrimal apparatus.
References in periodicals archive ?
Intubation granulomas of the lacrimal ducts in patients with silicone implants.
In terms of animal selection, Frame and Burkat [11] reported anatomical and histological differences of the rat, rabbit, pig, goat, and an additional 12 mammals as compared to humans, and thereby laid the foundation for preparing lacrimal duct models.
80 volunteers with normal lacrimal duct participated in the study, the left and right eyes were randomly selected, with a total of 80 eyes.
Lacrimal duct patency was not present, as revealed from dye passage test.
Late and very late initial probing for congenital haso lacrimal duct obstruction: what is the cause of failure?
The etiology involves inflammation of the lacrimal duct epithelium, followed by sloughing of epithelial cells and obstruction of the nasolacrimal duct apparatus.
However, cysts arising from the lacrimal duct are less frequently encountered [2-5].
Most cases of dacryocystitis in adults are caused by stenosis of the lacrimal duct with resultant stagnation of lacrimal fluid and subsequent infection.
In congenital cases particularly, dacryocystocele occurrence has been explained as the obstruction of the common canaliculi and lacrimal sac junction, by enlargement of the sac fundus which limits the movement of the Rosenmuller valve indirectly, and obstruction of the distal duct by the presence of a persistent membrane between the lacrimal duct and nasal mucosal epithelium, which is present in many newborns [3-5].
Analysis of the efficacy of early probing in the treatment of symptomatic congenital lacrimal duct obstruction in infants.
A team at University College London has successfully developed coronary artery bypass grafts, a heart valve, nose, ear, trachea, vascular bypass and lacrimal duct.