1. Vertebrates Mr. Skirbst Life Science Topic 17

2. Phylum Chordata

3. -Includes all vertebrates

4. Phylum Chordata -Includes all vertebrates -Vertebrate – animal that has a backbone (vertebral column)

5. 3 Characteristics -(at some point in their development)

6. 3 Characteristics -(at some point in their development)

7. 3 Characteristics 1- Nerve cord – hollow tube near back

8. 3 Characteristics 1- Nerve cord – hollow tube near back 2- Notochord – long, flexible support rod (vertebral column)

9. 3 Characteristics 1- Nerve cord – hollow tube near back 2- Notochord – long, flexible support rod (vertebral column) 3- Throat with gill slits (debatable)

10. 8 Groups of Chordates

11. 6 Groups of Ectotherms “coldblooded” body temp. = outside temp.

12. 8 Groups of Chordates 2 Groups of Endotherms “warmblooded” body temp. = constant

13. Fish Water-dwelling vertebrates that have: 1- scales 2- fins 3- gills

14. 3 main groups of fish 1- jawless – primitive, lack jaws (ex. Lamprey + hagfish)

15. 3 main groups of fish 2- cartilaginous – no “bones” Skeletons made of cartilage (ex. Sharks & rays)

16. 3 main groups of fish 2- cartilaginous – no “bones” Skeletons made of cartilage (ex. Sharks & rays) Sharks reproduce internally and must move gill slits to breathe

17. 3 main groups of fish 3- bony – skeletons of bone (ex. Trout & perch) * also have swim bladders