GENERAL HISTOLOGY

Detailed explanation-1: -If you’ve ever picked up a sea star and turned it over, you probably noticed the hundreds of tube “feet” lining its arms. It is these suction-bottomed tubes that the sea star uses to move about. It draws in water and channels it to canals that run throughout its body, usually ending in the tube feet.

Detailed explanation-2: -The animals rely on scores of tiny hydraulic “feet” that stick out underneath them. Usually, fluid fills and empties the podia at random to slide the starfish forward. For bouncing, the podia get in sync, with each third of them all filling at one time while the rest are swinging forward.

Detailed explanation-3: -The tube feet of echinoderms move and handle food using a hydraulic system.

Detailed explanation-4: -Feeding: Sea stars use their tube feet to handle their prey and bring it to their mouths, which are located on the oral side (or underside) of their bodies. They have the ability to extrude their stomachs through their mouths and engulf their prey.

Detailed explanation-5: -Most sea stars, sea urchins, and sea cucumbers have suction cups at the tips of their tube feet. In some sea stars and brittle stars the tube feet are shaped like little paddles.