hedgehog skin. Marine or brackish. Pentamerous symmetry. = 1. 5-pt symmetry o calcium carbonate. 2. balance. Endoskeleton = mesoderm. Size moderate to large. Most free moving. Deuterostome (primitive). Coelomocytes
Biology II Lecture Notes Echinodermata. References (Textbook - pages 556—557, Lab Manual pages 194-197). Echinodermata means spiny skin. Major Characteristics. 1. are triploblastic. N possess radial symmetry and usually has a 5 part body plan. 3. Echinoderms have an internal skeleton (endoskeleton) made of
Water Vascular System. • On the aboral surface is the opening of the water vascular system the madreporite (=sieve plate). • Water enters the madreporite and goes through the stone canal canal to the ring canal. • Water then passes through a radial canal extending into each arm. • All along the length of these canals are
Echinoderms possess a well developed internal skeleton made up of dermal calcareous plates (CaCO3) (known as ossicles). (The second defining character of echinoderms). Ossicles
ECHINODERMATA. (ASTEROIDEA). Asterias forbesi and A. vulgaris. LIVING MATERIAL: Both species are moderately abundant, and are obtained by dredging off Vine- yard Haven, near East Chop, Martha's Vineyard, Mass. The most reliable feature for distinguishing between them is the shape of the arms or rays; in A.
PHYLUM. ECHINODERMATA Baldago, De Lima, Javier, Plurad, Topinio. I. INTRODUCTION Etymology Echinos - Greek for spiny. Derma - skin. ECHINODERM BODY PLAN Larval Development- Bilaterally symmetrical. Secondary Radial Symmetry - adults. Pentameral symmetry of a Starfish. Free swimming larva.

PHYLUM ECHINODERMATA. - . GENERAL CHARACTERISTICS . -. Spiny-skinned animals possessing calcareous ossicles. - embedded in the dermis and spines protruding from the surface: this creates an internal skeleton. They are radially symnetrical in the adult phase and are characterized by having five rays,

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March 2018