Transcript
Page 1: Animal Diversity 3 Deuterostomes: Echinodermata and Chordata

Animal Diversity 3Deuterostomes: Echinodermata and Chordata

Page 2: Animal Diversity 3 Deuterostomes: Echinodermata and Chordata
Page 3: Animal Diversity 3 Deuterostomes: Echinodermata and Chordata
Page 4: Animal Diversity 3 Deuterostomes: Echinodermata and Chordata

Echinodermata & Chordata

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Echinodermata “Spiny skin”

• Endoskeleton of spiny plates

• Marine animals (no freshwater or terrestrial species)

• Adults = radial; larvae = bilateral

• Water vascular system (used for feeding, gas exchange, and locomotion)

• Canals end in “tube feet”; opening = madreporite

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Bilateral Larva

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Chordata

•Pharyngeal slits/pouches

•Dorsal nerve cord

•Notochord

•Post-anal tail

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Pharyngeal slits

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Dorsal (hollow) nerve cord

Nerve cord

Notochord

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(versus solid, ventral nerve cord)

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Notochord

Nerve cord

Notochord

Flexible rod that supports the nerve cord(becomes intervertebral discs in between vertebrae in humans.)

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Post anal tail

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(body extends past the anus...)

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Chordata

•Pharyngeal slits/pouches

•Dorsal nerve cord

•Notochord

•Post-anal tail

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Subphyla

Tunicata(once called Urochordata)Craniata

Cephalochordata

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CephalochordataExample: lancelets

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Tunicata

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Craniata (Vertebrata)

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Specimens today•Lancelet (one per table)

•Lamprey

•Sea cucumber

•Sea Urchin

•Sea Star


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