Respiratory organ, subdivided in various ways so as to increase the surface area available for gaseous exchange.
Alternative forms for gill : ctenidia, ctenidium, gills.
bipectinate_gill_ctenidium.jpg
bivalve-animal.jpg
caudofoveata-transverse.jpg
caudofoveata.jpg
cephalopoda-internal.jpg
internal_anatomy-prosobr.jpg
opisthobranchia_3.jpg
patella_sp.jpg
polyplacophora-transverse.jpg
polyplacophora.jpg
solenogastres.jpg