Vertebrates
Agnatha Common Name Representatives General Features “Jawless Fishes” sea lamprey, hagfish no jaws unpaired fins eel-like bodies notochord persists cartilage skeleton no scales smooth, slimy skin lamprey sucker-like mouth with teeth parasite of fish 2 chambered heart gills lamprey swims in a rippling manner external fertilization lamprey - larva, metamorphosis
Chondrichthyes “Cartilagenous Fishes” sharks, skates, rays movable jaws paired fins cartilage skeleton
Osteichthyes “Bony Fishes” salmon, trout, eel, hake, tuna, seahorse largest class! movable jaws paired fins w bony ribs bony skeleton protective, overlapping scales, lateral line various modes; typical GI tract + glands: liver, gall bladder, pancreas 2 chambered heart gills covered by operculum paired fins, side 2 side mvmt of tail + body; swim bladder (depth) external fertilization eggs + milt
Amphibia Amphibians (2 lives) frogs & toads (tailless) salamanders & newts born in water, adult lives on land (~ water); feet often webbed larva herbivorous+gills adult carnivorous+lungs thin, secretes mucus many breathe through it sensitive to pollutants frog tongue has sticky end to catch food; eyes drop down to swallow 3 chambered heart aquatic ~ gills & skin land ~ lungs & skin frogs & toads have long hind limbs for jumping external fertilization frog - amplexus tadpole metamorphosis
Integument
placoid scales (tooth-like) like sandpaper (no overlap) lateral line (pits sense mvmt) predator of fish, mollusks + lobster; triangular teeth continuously shed +replaced 2 chambered heart gills shark - streamlined body + paired fins, move by moving tail and trunk side to side shark - internal fertilization some are born alive, others lay fertilized eggs in capsule
Food Getting and Digestion Circulatory System Respiratory System Movement
Reproduction
Reptilia Common Name Representatives Reptiles turtles & tortoises lizards & snakes crocodiles, alligators, dinosaurs 1st fully terrestrial vertebrates
Chondrichthyes “Cartilagenous Fishes” sharks, skates, rays movable jaws paired fins cartilage skeleton
Osteichthyes “Bony Fishes” salmon, trout, eel, hake, tuna, seahorse largest class! movable jaws paired fins w bony ribs bony skeleton protective, overlapping scales, lateral line various modes; typical GI tract + glands: liver, gall bladder, pancreas 2 chambered heart gills covered by operculum paired fins, side 2 side mvmt of tail + body; swim bladder (depth) external fertilization eggs + milt
Amphibia Amphibians (2 lives) frogs & toads (tailless) salamanders & newts born in water, adult lives on land (~ water); feet often webbed larva herbivorous+gills adult carnivorous+lungs thin, secretes mucus many breathe through it sensitive to pollutants frog tongue has sticky end to catch food; eyes drop down to swallow 3 chambered heart aquatic ~ gills & skin land ~ lungs & skin frogs & toads have long hind limbs for jumping external fertilization frog - amplexus tadpole metamorphosis
Integument
placoid scales (tooth-like) like sandpaper (no overlap) lateral line (pits sense mvmt) predator of fish, mollusks + lobster; triangular teeth continuously shed +replaced 2 chambered heart gills shark - streamlined body + paired fins, move by moving tail and trunk side to side shark - internal fertilization some are born alive, others lay fertilized eggs in capsule
Food Getting and Digestion Circulatory System Respiratory System Movement
Reproduction
Reptilia Common Name Representatives Reptiles turtles & tortoises lizards & snakes crocodiles, alligators, dinosaurs 1st fully terrestrial vertebrates