When Patton Oswalt lets loose on Twitter (letâs skip the loaded troll descriptor for now), he really digs in and this time he exposed previously unknown depths of reaching when he somehow elicited Breitbart editor Ben Shapiro to inexplicably whine about anti-semitism and generally lose his mind.
Digestive System. Echinoderms have a simple digestive system with a mouth, stomachs, intestineand anus. In many, the mouth is on the underside and the anus on the top surface of the animal. Sea stars can push their stomachs outside of their body and insert it into its prey allowint them to digest the food externally.
Making the world better, one answer at a time. Echinoderms can have ambulacral parts that include ossicles, plates, spines, and suckers. For example, sea stars or star fish have an ambulacral groove on their oral side (underside).This ambulacral groove extends from the mouth to the end of each ray or arm. Each groove of each arm in turn has four rows of hollow tube feet that can be extended or withdrawn.aking the world better, one answer at a time. Echinoderms can have ambulacral parts that include ossicles, plates, spines, and suckers. For example, sea stars or star fish have an ambulacral groove on their oral side (underside).