GENERAL HISTOLOGY

Detailed explanation-1: -Echinoderms have a characteristic coelomic water vascular system. This system is controlled hydraulically. It comprises a circumoral ring covering the esophagus which connects radial canals. The radial canals lead to an ambulacrum.

Detailed explanation-2: -The water vascular system is enterocoelic in origin and arises from the left hydrocoel. It exhibits radial symmetry from the beginning and is equally developed in all echinoderms. This system lies just above the haemal system.

Detailed explanation-3: -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.

Detailed explanation-4: -Echinoderms have a unique system for gas exchange, nutrient circulation, and locomotion called the water vascular system. The system consists of a central ring canal and radial canals extending along each arm. Water circulates through these structures allowing for gas, nutrient, and waste exchange.