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 ?
Both inferior canaliculi are cannulated with a small cannula and these are connected to a Y-connector leading to the same syringe.
The nasolacrimal apparatus arises embryologically from a cord of surface ectoderm that invaginates between the maxillary and frontonasal processes, giving rise to the canaliculi proximally and the lacrimal sac and nasolacrimal duct distally.
Bilirubin conjugates are then actively secreted into the canaliculi by ABCC2 [membrane ATP-binding cassette subfamily C (CFTR/MRP) member 2].
The ocular adnexa are those anatomic structures that surround the eyeball, protect it from injury, and facilitate its functioning; this includes the conjunctiva (palpebral and bulbar), orbital cavity soft tissues, main lacrimal gland, accessory lacrimal glands, nasolacrimal drainage system (including the upper and lower canaliculi, lacrimal sac, and nasolacrimal duct), and the eyelid.
Natural cavities such as lacunae, canaliculi and haversian canals can also possibly initiate cracks when bone is subjected to high strain rates (2).
There was also downregulation of genes associated with movement of bile acids and xenobiotics into biliary canaliculi.
ALE was found to stimulate secretion of cholephilic compounds into the bile canaliculi that developing in primary hepatocyte cultures (Gebhardt and Ueberham, 1998).
During these same tests HepaLife's PICM-19 liver stem cells inside the Company's bioartificial liver maintained differentiated hepatic (liver) function, showing typical hepatocyte morphology -- the characteristics representative of human liver cells -- including cell features such as intercellular canaliculi, extensive Golgi apparatus, endoplasmic reticulum, peroxisomes and mitochondria.
A medial Lynch incision is made anterior to the medial canthus; care should be taken to avoid disruption of the canaliculi and lacrimal sac.
It is expressed by endometrial stromal sarcomas, tumors showing myoepithelial differentiation in the breast, RCC, bile canaliculi, and biliary epithelium in the liver.