1. Diversity of Chordates

2. Class Agnatha: Jawless Fishes
Lamprey and Hagfish
Gills
single loop, 2 chambers
Unpaired fins, muscles
External Fertilization
Ectotherms
Slimy/mucus-y
Salt and fresh water
Notochord remains thru adulthood
Rasping Tongue (parasites!)

3. Class Chondrichthyes: Cartilaginous Fish
Sharks, Skates, Rays
Gills
Single loop, 2 chambers
Paired fins, muscles
External Fertilization, some internal (sharks)
Ectotherms
Scales
Most salt water
Males have structures for internal fertilization (claspers
Some have lateral line system

4. Class Chondrichthyes: Cartilaginous Fish

5. Class Osteichythyes: Boney Fish
Trout, salmon, etc
Gills
Single loop, 2 chambers
Paired fins, muscles
External fertilization, “spawning”
Ectotherms
Scales
Fresh and salt water
Ray finned, Lobe finned
Swim bladder
Lateral Line System

6. Class Osteichythyes: Boney Fish

7. Class Amphibia “Double Life” Gills, Lungs, Skin
Double loop, 2 chambers
Limbs stick out sideways, muscles/ligaments
Mostly external fertilization
Ectothermic
Smooth, moist skin
Near fresh water
Frogs/Toads, Salamanders, Caecilians
Tympanic Membrane
Metamorphosis

8. Class Amphibia

9. Class Reptilia Lungs Double loop, 3 or 4 chambers
Limbs point towards ground, muscles/ligaments
Internal fertilization, Amniotic Egg
Ectothermic
Dry, Scaley skin
Tropical and Temperate climates
Turtles/Tortoises, Crocodilians, Lizards, Snakes, DINOSAURS!

10. Class Reptilia

11. Class Aves: Birds Adaptations for flight: Lungs
Feathers, upper limbs are wings, hollow bones
Lungs
Endothermic; very high body temperature
Double loop, 4 chambers
Internal fertilization, Amniotic egg
Endothermic
Live everywhere
Feathers; scales on feet/legs

12. Class Aves: Birds

13. Class Mammalia: Mammals
Mammary Glands, nurse offspring
Lungs
Double loop, 4 chambers
2/4 legs, muscles
Endothermic
Live everywhere
Placental, Marsupials, Montremes
Fat to insulate
Various teeth depending on food (herbivore, omnivore, carnivore, etc)

14. Class Mammalia: Mammals

15. Mammals Placental Mammals
Offspring are carried inside the mother until development is almost complete
Nourishment and oxygen provided via placenta

16. Mammals Marsupials Short period of development inside mom
Second period of development in a pouch made of hair and skin

17. Mammals Montremes Egg laying mammals Have hair and mammary glands
Only found in Australia, New Guinea, and Tasmania
Echidnas and Platypuses