| haversian | Pertaining to, or discovered by, Clopton Havers, an English physician of the seventeenth century. (01 Mar 1998) |
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| haversian canals | <anatomy> The small Vascular canal's that run longitudinally in the centre of haversian systems of compact osseous tissue, through which the blood vessels ramify in bone. Synonym: Leeuwenhoek's canals. (05 Mar 2000) |
| haversian lamella | One of the concentric tubular layers of bone surrounding the central canal in an osteon. Synonym: haversian lamella. (05 Mar 2000) |
| haversian spaces | <anatomy> Space's in bone formed by the enlargement of haversian canals. (05 Mar 2000) |
| haversian system | <anatomy> The basic unit of structure of compact bone, comprising a haversian canal and its concentrically arranged lamellae, of which there may be 4 to 20, each 3 to 7 microns thick, in a single haversian system. A haversian canal is a freely anastomosing channel in compact bone containing blood vessels and running longitudinally in the centre of haversian systems of compact osseous tissue. It was originally described by Clopton Havers, an english physician, in 1691. (12 Dec 1998) |
| ampulla of lacrimal canaliculus | A slight dilation at the angle of the lacrimal canaliculus immediately beyond the lacrimal punctum. Synonym: ampulla canaliculi lacrimalis. (05 Mar 2000) |
| anterior canaliculus of chorda tympani | <anatomy> A canal in the petrotympanic or glaserian fissure, near its posterior edge, through which the chorda tympani nerve issues from the skull. Synonym: Civinini's canal, Huguier's canal, iter chordae anterius. (05 Mar 2000) |
| auricular canaliculus | The canal that extends from the jugular fossa laterally through the mastoid process. It transmits the auricular branch of the vagus. Synonym: canaliculus mastoideus, auricular canaliculus. (05 Mar 2000) |
| biliary canaliculus | One of the intercellular channels, about 1 um or less in diameter, that occurs between liver cells forming the first portion of the bile system. Synonym: bile capillary. (05 Mar 2000) |
| bone canaliculus | The canaliculus interconnecting bone lacunae with one another or with a haversian canal; contains the interconnecting cytoplasmic processes of osteocytes. (05 Mar 2000) |
| canaliculus | A small canal or channel. See: iter. Origin: L. Dim. Fr. Canalis, canal (05 Mar 2000) |
| canaliculus chordae tympani | A canal leading from the facial canal to the tympanic cavity through which the chorda tympani nerve enters this cavity. Synonym: canaliculus chordae tympani, iter chordae posterius, small canal of chorda tympani. (05 Mar 2000) |
| canaliculus cochleae | A minute canal in the temporal bone that passes from the cochlea inferiorly to open in front of the medial side of the jugular fossa. It contains the perilymphatic duct. Synonym: canaliculus cochleae. (05 Mar 2000) |
| canaliculus innominatus | An occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve. Synonym: foramen petrosum, canaliculus innominatus, foramen of Arnold. (05 Mar 2000) |
| canaliculus lacrimalis | A curved canal beginning at the lacrimal punctum in the margin of each eyelid near the medial commissure and running transversely medially to empty with its fellow into the lacrimal sac. Synonym: canaliculus lacrimalis. (05 Mar 2000) |
| haversian canaliculus |
any one of a system of minute channels in compact bone connected with each haversian canal.
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| haversian canaliculus |
One of many channels extending from the lacuna of an osteocyte into the bone matrix, to a canaliculus of an adjacent osteocyte. By way of these channels osteocytes remain in contact with one another to transmit nutrients an
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