Lab Deuterostomes

Lab Deuterostomes - Deuterostomes I. Phylum Echinodermata...

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Deuterostomes I. Phylum Echinodermata a. Characteristics i. Spiny skin ii. Radial symmetry iii. No segmentation iv. Endoskeleton v. Water vascular system-network of tubes that go from tube feet throughout body; function for locomotion, feeding, gas exchange b. Classes (sea lab book for characteristics of each class) i. Asteroidean- sea star (dissect) ii. Ophiuroidea-brittle star iii. Echinoidea-sea urchins, sand dollar iv. Crinoidea-sea lilies v. Holothuroidea-sea cucumbers II. Phylum Chordata a. Characteristics i. Notochord-flexible rod between digestive tube and nerve cord ii. Dorsal hollow nerve cord-nerve running down back of organism iii. Pharyngeal slits-openings in pharynx that allow water to exit mouth iv. Deuterostome pattern of development v. Bilateral symmetry vi. Post anal tail-tail extends beyond anus vii. Complete digestive system viii. Ventral contractile blood vessel or heart b. Subphylum i. Urochordata-tunicate (sea squirt) 1. sessile, marine ii. Cephalochordata-lancelet (
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This note was uploaded on 04/23/2008 for the course SCI 1406 taught by Professor Sheffield during the Spring '08 term at Tarrant County.

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Lab Deuterostomes - Deuterostomes I. Phylum Echinodermata...

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