Editing Digenea (section)

===Digestive system===
As adults, most digeneans possess a terminal or subterminal mouth, a muscular pharynx that provides the force for ingesting food, and a forked, blind digestive system consisting of two tubular sacs called caeca (sing. [[caecum]]).  In some species the two gut caeca join posteriorly to make a ring-shaped gut or [[cyclocoel]].  In others the [[caecum|caeca]] may fuse with the body wall posteriorly to make one or more [[anus]]es, or with the excretory vesicle to form a [[uroproct]].  Digeneans are also capable of direct nutrient uptake through the tegument by [[pinocytosis]] and [[phagocytosis]] by the [[syncitium]]. Most adult digeneans occur in the vertebrate [[alimentary canal]] or its associated [[organ (anatomy)|organs]], where they most often graze on contents of the lumen (e.g., food ingested by the host, bile, mucus), but they may also feed across the mucosal wall (e.g., [[submucosa]], host blood).  The blood flukes, such as schistosomes, spirorchiids and sanguinicolids, feed exclusively on blood. Asexual stages in [[mollusc]] intermediate hosts feed mostly by direct absorption, although the [[Trematode lifecycle stages|redia]] stage found in some groups does have a mouth, pharynx and simple gut and may actively consume host tissue or even other parasites.  Encysted [[metacercaria]]l stages and free-living [[cercaria]]l stages do not feed.