From the posterior wall of the saccule a canal, the ductus endolymphaticus, is given off; this duct is joined by the ductus utriculosaccularis, and then passes along the aquaeductus vestibuli and ends in a blind pouch, the endolymphatic sac, on the posterior surface of the petrous portion of the temporal bone, where it is in contact with the dura mater. Studies suggest that the endolymphatic duct and endolymphatic sac perform both absorptive and secretory, as well as phagocytic and immunodefensive,functions . [WP,unvetted]. [ ]

Synonyms: saccus endolymphaticus

This is just here as a test because I lose it

Term information


uberon_slim, pheno_slim

editor note

EHDAA2 structure is embryonic

external definition

The blind extremity of the endolymphatic duct. [TFD][VHOG]

has related synonym

saccus endolymphaticus

homology notes

Many adult anamniotes have an endolymphatic duct that opens onto the surface of the head. In other vertebrates, it either is lost or forms a small, deeply seated endolymphatic sac.[well established][VHOG]