Echinoderms and Invertebrate Chordates

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Presentation transcript:

Echinoderms and Invertebrate Chordates Bio II Honors Rupp

Echinodermata Includes

Characteristics Radial symmetry Bilaterally symmetrical larva Deuterostomes—do you remember what this means? Endoskeleton Water-vascualr system Tube feet

Classification Crinoidea Sea lilies and feather stars

Classification Ophiuroidea Basket stars and brittle stars

Classification Echinoidea Sea urchins and sand dollars

Classification Holothuroidea Sea cucumbers

Classification Asteroidea Starfish

Structure and Function—External Anatomy Tube feet Oral versus aboral Pedicellariae

Structure and Function—Water Vascular System

Structure and Function—Feeding and Digestion

Structure and Function—General Body Systems No circulatory, excretory, or respiratory Gas exchange through tube feet Nerve ring and net

Structure and Function—Reproduction and Development Separate sexes External fertilization Larva-aka-bipinnaria

Invertebrate Chordate Characteristics Notochord Dorsal nerve cord Pharygeal gill pouches Postanal tail

Chordate Subphyla Vertebrata 95% of all chordate species

Chordate Subphyla Cephalochordata Lancelets

Chordate Subphyla Urochordata Tunicates Commonly known as sea squirts

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