GENERAL HISTOLOGY

Detailed explanation-1: -Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig. 3.83). 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-2: -Fast Facts. The echinoderms (Greek for spiny skin) include sea stars, sea urchins, feather stars, brittle stars and sea cucumbers. All are found in the marine environment in a range of habitats from intertidal surf beaches to the deepest oceans.

Detailed explanation-3: -Starfish are echinoderms, related to sea urchins and sea cucumbers.

Detailed explanation-4: -Natural history: Brittle stars belong to the Phylum Echinodermata. This group of “spiny-skinned” animals contains the sea stars, sea cucumbers, brittle stars and sea urchins.

Detailed explanation-5: -Asterias (Starfish) Echinus (Sea urchin) Antedon (Sea lily) Cucumaria (Sea cucumber) Ophiura (Brittle star)