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Related Flashcards
Cards In This Set
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Aboral side
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Dorsal side, where anus is located
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Oral side
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Ventral side, where mouth is located
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Water Vascular system
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A system of coelomic canals and tube-feet projections with multiple functions
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Functions of water vascular system
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Locomotion, respiration, transport of food and waste
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Madreporite
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On aboral surface, water enters
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Skeleton/ support-made of?
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Endoskeleton of calcareous ossicles
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Locomotion-how does it work?
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Tube feet; muscles coordinate water flor from ampulla to extend/ retract tube foot
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Dermal Endoskeleton-benefits?
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Composed of calcareous ossicles, covered by epidermis-benefits: allows continuous growth and provides protection
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Test
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Formed when ossicles fuse
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Pedicellaria
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Ossicles form jaw-like spines (asteroidea & echinoidea)
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Dermal papulae
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Fleshy dermal projections for respiration
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Development
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Indirect development, bilateral larval stage, some species have direct development
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Bipinnaria
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Asteroidea larva
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Class Asteroidea
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Sea stars/ starfish
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What class and side is are the ambulacral grooves found?
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Asteroidea, "open" with tube feet on oral side
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