GENERAL HISTOLOGY

Detailed explanation-1: -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-2: -Echinoderms are characterized by a unique coelomic water vascular system. This is a hydraulically controlled system consisting of a circumoral ring around the esophogus with connecting radial canals each leading to an ambulacrum.

Detailed explanation-3: -Define Echinoderm. Invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system. Examples: sea cucumbers, sea starts, sea urchins, and sand dollars.

Detailed explanation-4: -While many echinoderms do begin life as a bilateral larva, later they become radial with five-part symmetry and no central brain. The bodies of echinoderms are made of hard calcium-based plates that are often spiny and always covered by a thin skin. The echinoderm skeleton is thus on the inside-called an endoskeleton.

Detailed explanation-5: -Echinoderms possess a unique ambulacral or water vascular system, consisting of a central ring canal and radial canals that extend along each arm. Water circulates through these structures and facilitates gaseous exchange as well as nutrition, predation, and locomotion.