EFFERENT CHANNELS
Channels through which water passes from gills. Openings at sides of endostome, except in Section Oxystomata in which they open at middle of endostome [Williams, 1984].
Passageways through which water moves away from gills and out of branchial region [Moore and McCormick, 1969].
Passageways through which water moves away from gills and out of branchial region [McLaughlin, 1980].