GENERAL HISTOLOGY

Detailed explanation-1: -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-2: -The mouth in starfish is present on the oral (lower, ventral) surface and anus is on aboral (upper, dorsal) surface respectively.

Detailed explanation-3: -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-4: -Due to their tiny mouth on the underside of their body, starfish have adapted an ingenious way of eating things larger than it can fit in their mouth. They have a stomach that can digest food outside their body, so that it can fit in their mouth.

Detailed explanation-5: -In the echinoderms there are two surfaces. One is the oral surface, where the mouth is and the tube feet project. The tube feet on the oral surface are limited to distinct regions called the ambulacral regions. The other surface is the aboral, which typically contains the anal opening of the digestive system.