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Echinoderms and Invertebrate Chordates
Bio II Honors Rupp
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Echinodermata Includes
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Characteristics Radial symmetry Bilaterally symmetrical larva
Deuterostomes—do you remember what this means? Endoskeleton Water-vascualr system Tube feet
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Classification Crinoidea Sea lilies and feather stars
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Classification Ophiuroidea Basket stars and brittle stars
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Classification Echinoidea Sea urchins and sand dollars
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Classification Holothuroidea Sea cucumbers
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Classification Asteroidea Starfish
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Structure and Function—External Anatomy
Tube feet Oral versus aboral Pedicellariae
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Structure and Function—Water Vascular System
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Structure and Function—Feeding and Digestion
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Structure and Function—General Body Systems
No circulatory, excretory, or respiratory Gas exchange through tube feet Nerve ring and net
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Structure and Function—Reproduction and Development
Separate sexes External fertilization Larva-aka-bipinnaria
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Invertebrate Chordate Characteristics
Notochord Dorsal nerve cord Pharygeal gill pouches Postanal tail
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Chordate Subphyla Vertebrata 95% of all chordate species
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Chordate Subphyla Cephalochordata Lancelets
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Chordate Subphyla Urochordata Tunicates Commonly known as sea squirts
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