Polychaete
The mouth of polychaetes is situated on the peristomium, the portion behind the prostomium, and shifts in structure contingent upon their eating methodologies, since the gathering incorporates predators, herbivores, channel feeders, foragers, and parasites. When all is said in done, notwithstanding, they have a couple of jaws and a pharynx that can be quickly everted, permitting the worms to get sustenance and maneuver it into their mouths. In a few animal groups, the pharynx is altered into an extensive proboscis. The digestive tract is a straightforward tube, more often than not with a stomach part route along.