Presentation on theme: "Vertebrates: Part I Fishes & Amphibians. Phylum Chordata Chordates: includes all the vertebrates Have 3 common characteristics: –Nerve Cord: hollow tube."— Presentation transcript:
Phylum Chordata Chordates: includes all the vertebrates Have 3 common characteristics: –Nerve Cord: hollow tube that hold nervous tissue –Notochord: rod that runs down the back for support (in higher vertebrates it is replaced with the vertebral column) –Throat with gill slits: used for breathing (in higher vertebrates these turn into the trachea)
Phylum Chordata There are 5 groups in the phylum Chordata we will study –3 groups are cold blooded: no internal temp regulation. They take on the temp of their surroundings –2 groups are warmblooded: maintain a constant body temp
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