GENERAL HISTOLOGY

Detailed explanation-1: -If you were to examine the underside of a sea star, also known as the oral side (where the mouth is located), you would see rows and rows of tube feet. Tube feet are used for locomotion for most echinoderms .

Detailed explanation-2: -Sea water, instead of blood, is actually used to pump nutrients through their bodies via a ‘water vascular system. ‘ Also, sea stars move by using tiny tube feet located on the underside of their bodies.

Detailed explanation-3: -The bottom of the sea star is called the oral surface, because that’s where the mouth is. If you look at that side, you’ll see tiny tube feet with suction cups that line each arm. Those sticky tube feet help the animal hold onto its prey-usually bivalves, like clams and scallops.

Detailed explanation-4: -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-5: -Most of the long body is covered by the oral surface, with tube feet projecting in five rows. Many of the tube feet around the mouth take the form of long tentacles, used for gathering food.