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NAME THE STRUCTURE. MOUTH. IS THIS THE ORAL OR ABORAL SURFACE OF THE SEA STAR?. ORAL. NAME THE SPINY STRUCTURES. ORAL SPINES. WHAT IS THEIR FUNCTION. FOOD PROCUREMENT. NAME THE STRUCTURE. AMBULACRAL GROOVE. WHAT IS IN THE AMBULACRAL GROOVES?. TUBE FEET. WHAT IS THEIR FUNCTION?.
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THE WATER VASCULAR SYSTEM THAT MOVES WATER INTO OR OUT OF THE TUBE FEET
RADIAL SYMMETRY IN ADULT SPINY-SKINNED USUALLY TUBE FEET AND PEDICELLARIAE PENTAMOROUS DEUTEROSTOME CALCIUM-BASED ENDOSKELETON FORMED OF INDIVIDUAL UNITS CALLED OSSICLES