Phylum Echinodermata Starfishes, sea urchins, sea cucumbers.
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Transcript of Phylum Echinodermata Starfishes, sea urchins, sea cucumbers.
Phylum EchinodermataPhylum Echinodermata
Starfishes, sea urchins, sea Starfishes, sea urchins, sea cucumberscucumbers
Higher ClassificationHigher ClassificationEchinodermataEchinodermata
Class Asteroidea – sea starsClass Asteroidea – sea stars Class Ophiuroidea – brittle starsClass Ophiuroidea – brittle stars Class Echinoidea – sea urchinsClass Echinoidea – sea urchins Class Holothuroidea – sea cucumbersClass Holothuroidea – sea cucumbers Class Crinoidea – sea feathersClass Crinoidea – sea feathers
General CharacteristicsGeneral Characteristics
Exclusively MarineExclusively Marine Body unsegmented Body unsegmented Adults with pentamerous secondary Adults with pentamerous secondary
radial symmetryradial symmetry Larvae bilaterally symmetricalLarvae bilaterally symmetrical With unique water vascular systemWith unique water vascular system
Larval Echinoderms showing Larval Echinoderms showing bilateral symmetrybilateral symmetry
Water Vascular SystemWater Vascular System
First phylum with internal skeletonFirst phylum with internal skeleton With dermal calcareous ossiclesWith dermal calcareous ossicles Some with spines or spiculesSome with spines or spicules
Digestive system completeDigestive system complete Respiration by dermal branchae, tube feet, Respiration by dermal branchae, tube feet,
or respiratory treeor respiratory tree No kidneysNo kidneys DioeciousDioecious Locomotion by tube feet, and/or armsLocomotion by tube feet, and/or arms
General Characteristics General Characteristics cont.cont.
External AnatomyExternal Anatomy
Internal AnatomyInternal Anatomy
Brittle star anatomyBrittle star anatomy
Anatomy of a Sea UrchinAnatomy of a Sea Urchin
Aristotle’s LanternAristotle’s Lantern
Sea Urchin AnatomySea Urchin Anatomy
AsteroideaAsteroidea
OphiurodeaOphiurodea
EchinoideaEchinoidea
HolothuroideaHolothuroidea
CrinoideaCrinoidea