OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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madreporite
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radial canals
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tube feet
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ampullae
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Detailed explanation-1: -Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittle stars, and have only a feeding function in feather stars.
Detailed explanation-2: -Sea stars have a water vascular system and tube feet much like those of the sea urchins.
Detailed explanation-3: -Sea Stars: Most sea stars have five arms. The underside of each arm holds 2-4 rows of tube feet, or suction cup feet. They use these feet to hold onto and move around on rocks and on the ocean floor. Brittle stars: Brittle means it’s fragile and breaks easily.
Detailed explanation-4: -Madreporite. Stone canal. Circular ring canal. Radial canals. Lateral canals. Tube feet. 11-Dec-2015