GENERAL HISTOLOGY

Detailed explanation-1: -The top side of the sea star is called the aboral side, because it’s opposite the oral side. The bumpy-skinned aboral side is covered with loads of tiny pinchers called pedicellariae that help clean the rough surface.

Detailed explanation-2: -Aboral Surface Definition Aboral surface denotes parts that are situated opposite to or away from the mouth, (oral surface) especially in animals like echinoderms, where they lack a clear upper and a lower side.

Detailed explanation-3: -3.83). Sea stars (class Asteroidea) and brittle stars (class Ophiuroidea) have flat bodies with a broad aboral surface facing up and an oral surface facing down. Both groups have arms projecting from a central body disc and the ambulacral regions with the projecting tube feet extending along each of the arms (Fig.

Detailed explanation-4: -Locomotion: They use a water-vascular system, which is like a network of canals and reservoirs. Water is pulled in through the madreporite (the pale spot on top of the sea star) and sent to the tube feet to make them move.

Detailed explanation-5: -Sea stars have two surfaces: the oral and the aboral. The oral is the side with the sea star’s mouth and most people would think of it as the “bottom.” The aboral is the opposite side, and this is where the madreporite lies. The madreporite is the opening to the water vascular system.