What is "lagena"

Lagena \La*ge"na\, n.; pl. L. Lagen[ae], E. Lagenas. [L., a flask; cf. Gr. ?, ?.] (Anat.) The terminal part of the cochlea in birds and most reptiles; an appendage of the sacculus, corresponding to the cochlea, in fishes and amphibians.

n. 1 (context anatomy English) The upper part of the cochlear duct. 2 A similar structure, shaped like a flask, that is a hearing organ in some vertebrates.

In human anatomy of the ear, the extremities of the ductus cochlearis are closed; the upper is termed the lagena and is attached to the cupula at the upper part of the helicotrema; the lower is lodged in the recessus cochlearis of the vestibule.