GENERAL HISTOLOGY

Detailed explanation-1: -Each tube foot acts like a sticky suction cup that grips the surface beneath the echinoderm. In this way they are able to move around. They do not have a head with sense organs. Instead, they are adapted to respond to food or predators coming from any direction.

Detailed explanation-2: -Most sea stars, sea urchins, and sea cucumbers have suction cups at the tips of their tube feet.

Detailed explanation-3: -Echinoderms have feet too, but they are called tube feet. They have many little tube feet that are like little hoses with suction cups at the end. A feature that is unique to this group is their water vascular system.

Detailed explanation-4: -The tube feet of echinoderms move and handle food using a hydraulic system. “Something similar happens in echinoderm tube feet–small, soft, unjointed, and exceedingly numerous organs used for locomotion, handling food, and similar functions, noticeable when a starfish creeps up the glass wall of an aquarium.

Detailed explanation-5: -Tube feet function in locomotion, feeding, and respiration. The tube feet in a starfish are arranged in grooves along the arms. They operate through hydraulic pressure. They are used to pass food to the oral mouth at the center, and can attach to surfaces.