GENERAL HISTOLOGY

Detailed explanation-1: -The water vascular system of echinoderms is essentially a system of fluid-filled canals that extends along each of the body regions and has many external projections called tube feet. Although most species lack respiratory and excretory organs, echinoderms do have a circulatory system and a digestive system.

Detailed explanation-2: -Water vascular system: network of fluid-filled canals that enables movement. Water enters through a small filter called the sieve. plate or madreporite located topside near its center. plate or madreporite, located topside near its center. The water then passes down through a short stone.

Detailed explanation-3: -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-4: -Although they may appear very different, echinoderms all have two major defining characteristics that set them apart from all other animals: a water vascular system and five-sided radial symmetry. The water vascular system is a complex series of canals running through an echinoderm’s body (Fig.

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.