入水管

水流由外界进入软体动物外套腔的通道.入水管由套膜形成.腹足纲许多动物的入水管在头部背面的左侧. 瓣鳃纲动物多数种类的套膜在身体后端有两处愈合而形成３个孔道，背面的为出水管，紧贴其下的为入水管，套膜腹缘的孔道供足出入.入水管可和出水管紧密结合甚至外表愈合为１条长管.Water flow from the outside into the mollusk coats the channel cavity. Into the water pipe from the sets of film formation. Gastropoda many of the animals into the water pipe to the left of the back of the head. Lamellibranchiata animals, most types of sets of membranes in the body there are two back-end healing and the formation of three pore, on the back of the outlet pipe, close to the inlet pipe under it, ventral edge of the pore membrane cover for full access. inlet pipe and outlet pipe can be even the appearance of the close combination of the healing of a long tube.