canaliculus

canaliculus /can·a·lic·u·lus/ (kan?ah-lik´u-lus) pl. canali´culi   [L.] an extremely narrow tubular passage or channel.canalic´ular

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apical canaliculus  one of the numerous tubular invaginations arising from the clefts between the microvilli of the proximal convoluted tubule of the kidney and extending downward into the apical cytoplasm.

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.

cochlear canaliculus  a small canal in the petrous part of the temporal bone that interconnects the scala tympani with the subarachnoid space; it houses the perilymphatic duct and a small vein.

dental canaliculi  minute channels in dentin, extending from the pulp cavity to the overlying cement and enamel.

intercellular canaliculus  one located between adjacent cells, such as one of the secretory capillaries, or canaliculi, of the gastric parietal cells.

intracellular canaliculi of parietal cells  a system of canaliculi that seem to be intracellular but are formed by deep invaginations of the surface of the gastric parietal cells rather than extending into the cytoplasm of the cell.

lacrimal canaliculus  the short passage in the eyelid, beginning at the lacrimal point and draining tears from the lacrimal lake to the lacrimal sac.

mastoid canaliculus  a small channel in the temporal bone transmitting the auricular branch of the vagus nerve.

tympanic canaliculus  a small opening on the inferior surface of the petrous portion of the temporal bone, transmitting the tympanic branch of the glossopharyngeal nerve and a small artery.

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can·a·lic·u·lus (kn-lky-ls)

n. pl. can·a·lic·u·li (-l)

A small canal or duct in the body, as one of the minute channels in compact bone.

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canaliculus (kan´lik´ylus),

n a small channel that extends from or to the lacunae of bone and cementum and contains filamentous processes of the cells that occupy the lacunae; interconnects with canaliculi extending from neighboring lacunae.

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canaliculus

pl. canaliculi [L.] an extremely narrow tubular passage or channel.

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bile canaliculus

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 canaliculus

branching tubular passages radiating like wheel spokes from each bone lacuna to connect with the canaliculi of adjacent lacunae, and with the haversian canal.

dentinal canaliculus

in the tooth dentine; converge towards the pulp of the tooth.

intracellular canaliculus

intracellular connection between apical plasmalemma and cytoplasm proper of the parietal cells in the gastric mucosa.

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 tympanic branch of the vagus nerve.

secretory canaliculus

small canals in serous glandular epithelial cells connecting the cells with the luminal surface.