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 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.

Detailed explanation-3: -Instead of having a central brain that tells each foot when to move, starfish leave most of the decision-making to the individual feet. Each tube foot is able to use smell, taste and touch to understand the world around it.

Detailed explanation-4: -Sea stars have a water vascular system and tube feet much like those of the sea urchins. Ambulacral grooves (from the Latin root ambul meaning walk) are narrow channels in the oral surface of a sea star filled with tube feet. The tube feet are used mainly for grabbing and locomotion.