canaliculi


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Related to canaliculi: Haversian system, Lacrimal canaliculi

canaliculus

 [kan″ah-lik´u-lus] (pl. canali´culi) (L.)
an extremely narrow tubular passage or channel. adj., adj canalic´ular.
bile canaliculi fine tubular channels forming a three-dimensional network within the parenchyma of the liver. They join to form the bile ductules and eventually the hepatic duct.
bone canaliculi branching tubular passages radiating like wheel spokes from each bone lacuna to connect with the canaliculi of adjacent lacunae, and with the haversian canal.
lacrimal canaliculus the short passage in an eyelid, beginning at the lacrimal point and draining tears from the lacrimal lake to the lacrimal sac; called also lacrimal duct. See also lacrimal apparatus.
mastoid canaliculus a small channel in the temporal bone transmitting the auricular branch of the vagus nerve.

can·a·lic·u·li

(kan-ă-lik'yū-lī),
Plural of canaliculus.

can·a·lic·u·li

(kan'ă-lik'yū-lī)
Plural of canaliculus.

canaliculi

fine channels, e.g. those which occur in bone.

Canaliculi

Also known as lacrimal ducts, these tube-like structures carry the tears from the eyes to the lacrimal sac.
Mentioned in: Dacryocystitis

lacrimal apparatus

The system involved in the production and conduction of tears. It consists of the lacrimal gland and accessory lacrimal glands (glands of Krause and Wolfring); the eyelid margins; and the two puncta lacrimae. Each punctum is a small round or oval aperture situated on a slight elevation at the inner end of the upper and lower lid margin (lacrimal papilla) and forms the entrance to the canaliculi. Each canaliculus consists of a vertical portion of about

lacrimal apparatus

The system involved in the production and conduction of tears. It consists of the lacrimal gland and accessory lacrimal glands (glands of Krause and Wolfring); the eyelid margins; and the two puncta lacrimae. Each punctum is a small round or oval aperture situated on a slight elevation at the inner end of the upper and lower lid margin (lacrimal papilla) and forms the entrance to the canaliculi. Each canaliculus consists of a vertical portion of about 2 mm long and then bends inward for some 8 mm, the upper one being slightly shorter. The canaliculi pierce the lacrimal fascia (i.e. the periorbita covering the lacrimal sac or tear sac) and unite (forming the common canaliculus) to enter a small diverticulum of the sac called the sinus of Maier. The lacrimal sac is closed above and open below where it is continuous with the nasolacrimal duct which extends over some 1.5 cm in length to Hasner's valve (or Bianchi's valve or plica lacrimalis) (folds of mucous membrane) at the inferior meatus of the nose. The inferior opening of the duct is called the ostium lacrimale (Fig. L1). See dacryocystitis; epiphora; lacrimal fistula; fossa for the lacrimal sac; Sjögren's syndrome; tear duct; dye dilution test; Jones II test; valve of Krause.
Fig. L1 Lacrimal apparatusenlarge picture
Fig. L1 Lacrimal apparatus
References in periodicals archive ?
Similarly, they explain that GGT is an enzyme that exhibits increased activity in liver diseases associated with cholestasis since it is linked to cells membranes and is mainly located in canaliculi, bile ducts, and to a lesser extent in hepatocytes and is released when there these structures are damaged.
Animals were divided into two experimental groups, named after the adhesive being used in the occlusion of the inferior lacrimal punctum and canaliculi of the right eye: Group n-butylcyanoacrylate (a) (GB, n=6) and Group 2-ocytilcyanoacrylate (b) (GO, n=5).
The congenital defects of lacrimal apparatus are congenital absence of lacrimal gland, congenital fistula of lacrimal gland, atresia of the lacrimal punctum, atresia of the canaliculi, mucocele of the lacrimal sac but most common malformation is congenital blockage of nasolacrimal duct which may be complete or partial and is bilateral in 1/3 of cases.
Mature macrogamonts and zygotes were characterized by a huge number of amylopectin granules scattered in their cytoplasm together with less number of lipid vacuoles and numerous canaliculi.
Known causes of failure of DCR are obstruction of the common canaliculi, closure of osteotomy site, retained stent material and excessive scar formation within the rhinostomy.
Bile produced by the liver from the breakdown of haemoglobin, is collected in bile canaliculi which merge to form bile ducts.
2007]; disinfection of root canals and sealing of canaliculi in endodontics [Kimura et al.
Extensive cell-cell contact between hepatocytes grown in aggregates promotes the formation of gap junctions, tight junctions, and bile canaliculi that are important for stabilizing the hepatocyte phenotype (59), (60).
Lacrimal fluid drains through the puncta into the lacrimal canaliculi and then into the lacrimal sac behind the medial canthal tendon.
The bile canaliculi between hepatocytes typically lie in apical cell regions, toward the center of tubules or cords, although a few perisinusoidal canaliculi do occur.
Liver biopsy is unnecessary in suspected cases of ICP, but would show cholestatic changes such as dilated bile canaliculi, bile pigment in the parenchyma, and minimal inflammation.
Another mechanism leading to cholestasis is mediated by drugs that bind to actin filaments, resulting in disruption of the actin filaments situated around the bile canaliculi, thus preventing the normal pulsatile contractions that move bile through the canalicular system to the bile ducts (Cullen 2005).