GENERAL HISTOLOGY

Detailed explanation-1: -A structure on top of the body, called the madreporite, regulates the amount of water in the water vascular system. “Tube feet, ” which protrude through openings in the endoskeleton, may be expanded or contracted using the hydrostatic pressure in the system.

Detailed explanation-2: -Tiedemann’s bodies and polian vescicles are pouches on the ring canal whose function may be osmoregulation or hydraulic regulation within the water vascular system. Each radial canal ends in a terminal tube foot, which has a sensory function.

Detailed explanation-3: -Water Vascular System. The water vascular system of echinoderms is essentially a system of fluid-filled canals that extend along each of the body regions and have many external projections called tube feet.

Detailed explanation-4: -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.

Detailed explanation-5: -The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.