The document summarizes the characteristics of the phylum Chordata. There are seven main classes of chordates:
1) Agnatha - Jawless fish with a notochord but no jaws, scales or fins. They have gills and are marine or freshwater ectotherms.
2) Condrichythes - Sharks, rays and skates with cartilage skeletons, paired fins, placoid scales and teeth that point inward. They are marine ectothermic carnivores or filter feeders.
3) Osteichthyes - Bony fish with paired fins, scales, swim bladders, chromatophores and lateral lines. They can be marine or fresh
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1. Overview of Phylum Chordata Essential Question: What characteristics to all chordates have in common? Essential Question: What classes of animals make up phylum Chordata?
6. Class: Condrichythes “Sharks, Rays & Skates” Skeleton of cartilage Paired fins Most are carnivores; some filter feeders Placoid scales Teeth that point inward Gills All marine Ectotherm
7. Class: Osteichthyes “Bony Fish” Paired fins & scales Swim bladder Chromatophores Lateral Line Gills Marine & fresh water Ectotherm