1. Phylum Chordata
Phylum:
Chordata

2. 4 Characteristics of Chordates
Defining Characteristics 1
Notochord. Found under the nerve chord. Runs down the dorsal side of an organism 2 3 4

3. 4 Characteristics of Chordates
Defining Characteristics 1
Notochord. Found under the nerve chord. Runs down the dorsal side of an organism 2
Dorsal Tubular nerve cord. Nerves arranged as a pipe filled with fliud 3 4

4. 4 Characteristics of Chordates
Defining Characteristics 1
Notochord. Found under the nerve chord. Runs down the dorsal side of an organism 2
Dorsal Tubular nerve cord. Nerves arranged as a pipe filled with fliud 3
Pharyngeal gill pouches (develop into gills in fish and amphibians and various other parts in reptiles to mammals (eg. Inner ear)) 4

5. 4 Characteristics of Chordates
Defining Characteristics 1
Notochord. Found under the nerve chord. Runs down the dorsal side of an organism 2
Dorsal Tubular nerve cord. Nerves arranged as a pipe filled with fliud 3
Pharyngeal gill pouches (develop into gills in fish and amphibians and various other parts in reptiles to mammals (eg. Inner ear)) 4
Muscular Postanal Tail (post = after anal = anus)

6. Subphylums of Chordata
Characteristics
Urochordata
Larvae: Has all 4 characteristics of chordates
Adult: Sessile, Lacks chordate characteristics with the exception of the pharyngeal pouches
Cephalochordata
Vertebrata

7. Subphylums of Chordata
Characteristics
Urochordata
Larvae: Has all 4 characteristics of chordates
Adult: Sessile, Lacks chordate characteristics with the exception of the pharyngeal pouches
Cephalochordata
Aquatic organisms containing all 4 characteristics of chordates as an adult
Vertebrata

8. Subphylums of Chordata
Characteristics
Urochordata
Larvae: Has all 4 characteristics of chordates
Adult: Sessile, Lacks chordate characteristics with the exception of the pharyngeal pouches
Cephalochordata
Aquatic organisms containing all 4 characteristics of chordates as an adult
Vertebrata
Contain all 4 characteristics of chordates. The notochord, however, is replaced by vertebral column

9. Trends in Evolution of Chordates

10. Trends in Evolution of Chordates

11. Trends in Evolution of Chordates

12. Trends in Evolution of Chordates

13. Trends in Evolution of Chordates

14. Trends in Evolution of Chordates

16. Subphylum Vertebrata
Class Osteicthyes: Most diverse class of vertebrate Fins Uses: Balance and Movement Two types of fins

17. Subphylum Vertebrata
Class Osteicthyes: Most diverse class of vertebrate
Fins
Uses: Balance and Movement
Two types of fins
Ray-finned fishes: Thin fins
supported by rigid ray structures
2) Lobe-finned fishes: fins are made of fleshy appendages. Later evolved into legs.

18. Characteristics of Ray-Finned Fish
Bony Skeleton and scales
Swim bladder (Air sac allows fish to hover in the water column)
2 chambered heart

19. Characteristics of Ray-Finned Fish
Bony Skeleton and scales
Swim bladder (Air sac allows fish to hover in the water column)
2 chambered heart
Paired fins
Jaws
Gills

20. Class: Amphibia
Amphibian: Live in land and water (Larval stage is aquatic, Adult stage is terrestrial) Common Examples: Frogs, Toads, Newts, Salamanders, Caecilians, Major Evolutionary Change:

21. Class: Amphibia
Amphibian: Live in land and water (Larval stage is aquatic, Adult stage is terrestrial) Common Examples: Frogs, Toads, Newts, Salamanders, Caecilians, Major Evolutionary Change: Jointed Limbs that allowed the move to land

22. Characteristics of Amphibians
Tetrapods (four legs)
Undergo metamorphosis
Three chambered heart
Lungs in adults
Smooth moist skin (Capable of gas exchange)