title: Canaliculus
text: # Canaliculus
  
  In anatomy, a canaliculus is a small passageway.
  
  Examples include:
  
  * Two functionally different structures in bone:
     * Bone canaliculus, a small channel found in ossified bone for nutrition for example in the Haversian canal
     * A small canal (anatomy) in bone which carries some structure (such as a nerve) through it
  * Canaliculus (parietal cell), an adaptation found on gastric parietal cells
  * The lacrimal canaliculi, several small ducts in the eye
  * The dental canaliculi, the blood supply within a tooth
  * Bile canaliculi, where the bile produced by the hepatocytes is drained
  * Inferior tympanic canaliculus, the passage for the tympanic branch of the glossopharyngeal nerve and inferior tympanic artery
  * Foramen petrosum (canaliculus innominatus), a small occasional opening in the greater wing of the sphenoid bone
  