Vertebrates 9

Vertebrates 9 - Chordates, Lab Topic 9.9 pp. 193-199 Phylum...

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Chordates, Lab Topic 9.9 pp. 193-199
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Phylum Chordata Triploblastic, coelomates, bilateral symmetry Dueterostome Segmentation Closed circulatory system a dorsal notochord a dorsal, hollow nerve cord pharyngeal gill slits a muscular, post-anal tail
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Fig. 34-3: General Chordate Body Plan Dorsal, hollow nerve cord Anus Muscular, post-anal tail Pharyngeal slits or clefts Notochord Mouth Muscle segments
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Fig. 34-2 Lobed fins Legs Amniotic egg Milk Jaws, mineralized skeleton Lungs or lung derivatives Vertebral column Head Notochord Common ancestor of chordates ANCESTRAL DEUTERO- STOME Echinodermata (sister group to chordates) Chondrichthyes (sharks, rays, chimaeras) Cephalochordata (lancelets) Urochordata (tunicates) Myxini (hagfishes) Petromyzontida (lampreys) Mammalia (mammals) Actinopterygii (ray-finned fishes) Actinistia (coelacanths) Amphibia (frogs, salamanders) Dipnoi (lungfishes) Reptilia (turtles, snakes, crocodiles, birds) Chordates Craniates Vertebrates Gnathostomes Lobe-fins Osteichthyans Tetrapods Amniotes This week in lab
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Lancelets (Cephalochordates), tunicates (Urochordates) filter feed using pharyngeal gill slits Hagfishes (Myxini)- belong to the group of chordates with ‘ a head’ called the craniates. Lancelet
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This note was uploaded on 08/28/2011 for the course BISC 13004 taught by Professor Wetzer during the Spring '09 term at USC.

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Vertebrates 9 - Chordates, Lab Topic 9.9 pp. 193-199 Phylum...

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