GENERAL HISTOLOGY

Detailed explanation-1: -The water vascular system performs a variety of functions such as movement, food intake and transport, and breathing. This system of echinoderms is called the water vascular system because it acts as a circulatory system to maintain a continuous flow of water in and out of the body.

Detailed explanation-2: -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.

Detailed explanation-3: -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.

Detailed explanation-4: -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. The radial canals in crinoids run along each arm into an ambulcral groove and tube feet.

Detailed explanation-5: -Characteristics of Echinodermata They have a star-like appearance and are spherical or elongated. They are exclusively marine animals. The organisms are spiny-skinned. They exhibit organ system level of organization.