class agnatha: jawless fishes lamprey and hagfish gills single loop, 2 chambers unpaired fins,...
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Class Agnatha: Jawless Class Agnatha: Jawless FishesFishes
• 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!)
Class Chondrichthyes: Class Chondrichthyes: Cartilaginous FishCartilaginous 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
Class Chondrichthyes: Class Chondrichthyes: Cartilaginous FishCartilaginous Fish
Class Osteichythyes: Boney Class Osteichythyes: Boney FishFish
• 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
Class Osteichythyes: Boney Class Osteichythyes: Boney FishFish
Class AmphibiaClass 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
Class AmphibiaClass Amphibia
Class ReptiliaClass 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!
Class Reptilia
Class Aves: BirdsClass Aves: Birds• Adaptations for flight:
– 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
Class Aves: BirdsClass Aves: Birds
Class Mammalia: Class Mammalia: MammalsMammals
• 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)
Class Mammalia: Class Mammalia: MammalsMammals
MammalsMammals• Placental Mammals
– Offspring are carried inside the mother until development is almost complete
– Nourishment and oxygen provided via placenta
MammalsMammals• Marsupials–Short period of development
inside mom–Second period of development
in a pouch made of hair and skin
MammalsMammals
• Montremes– Egg laying mammals– Have hair and
mammary glands– Only found in
Australia, New Guinea, and Tasmania
– Echidnas and Platypuses