phylum chordata notochord nerve chord tail pharyngeal slits
TRANSCRIPT
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Phylum Chordata
• Notochord• Nerve chord• Tail• Pharyngeal slits
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Evolution of the jaw
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Phylum Chordata
• Notochord• Nerve chord• Tail• Pharyngeal slits
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Subphylum Urochordata
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Sea Squirts
Have notochord as a larvae
Sessile as adult
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Tunicate (Sea Squirt)
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Slipper Tunicate
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Stalked Tunicate
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Subphylum Cephalochordata
- Lanceletes
(AKA: Amphioxus)
notochord
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Subphylum Cephalochordata-Poorly developed brain
- Poorly developed sense organs
-Considered an evolutionary link between invertebrates and vertebrates
notochord
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Subphylum VertebrataSubphylum Vertebrata• Spinal chordSpinal chord• Movement accomplished w/ muscles attached to Movement accomplished w/ muscles attached to
an endoskeletonan endoskeleton• Digestive system w/ liver, digestive glands and Digestive system w/ liver, digestive glands and
pancreaspancreas• Heart w/ 2-4 chambersHeart w/ 2-4 chambers• Blood containing hemoglobinBlood containing hemoglobin• Paired kidneysPaired kidneys• General body plan consisting of a head, trunk General body plan consisting of a head, trunk
and two pairs of appendages (some are highly and two pairs of appendages (some are highly modified!)modified!)
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Class AgnathaClass Agnatha
• Jawless fishJawless fish
• Cartilage skeletonCartilage skeleton
• Gill slitsGill slits
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Gill SlitsGill Slits
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Class AgnathaClass Agnatha
• Jawless fishJawless fish
• Cartilage skeletonCartilage skeleton
• Gill slitsGill slits
• No swim bladderNo swim bladder
• Two chambered heartTwo chambered heart
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Two Chambered Heart
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HagfishHagfish
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HagfishHagfishmouthmouth
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Lamprey
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Lampreymouth
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Class Chondrichthyes• Cartilage skeleton
• Gill slits
• Dermal denticles (skin teeth)
• No swim bladder
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Prehistoric Sharks
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Nurse Shark
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Reef Shark
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Hammerhead Shark
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Southern Sting Ray
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Spotted Eagle Ray
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Class Osteichthyes
• Bony skeleton
• Swim bladder
• Operculum
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Nassau Grouper
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Beaugregory Damselfish
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Queen Parrotfish
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Spotfin Butterflyfish
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Gray Angelfish
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Moray Eel
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Seahorse
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Class Amphibia
• Aquatic juvenile• Terrestrial adult
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Class Amphibia
• Aquatic juvenile• Terrestrial adult• Thin, moist skin• Must live in wet habitat• Three Chambered Heart
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Tree Frog
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American Toad
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Salamander
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Salamander Larvae
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Redspot Newt
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Class Reptilia
• Thick, scaly skin• Lay eggs on land• 4 chambered heart, but ventricles not
completely divided
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Reptiles
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Corn Snake
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Ribbon Snake
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Red Tailed Boa
Constrictor
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Green Iguana
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Leopard Geckos
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American Alligator
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Baby Alligator
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Hawksbill Sea Turtle
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Green Sea Turtle
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Red-Bellied Turtle
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Class Aves
• Endothermic (warm blooded)
• Incubate eggs• Feathers• Hollow bones• Beak• 4 chambered heart
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Birds - Aves
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Osprey
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Great Blue Heron
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Green Backed Heron
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White Ibis
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Roseate Spoonbills
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Brown Pelican
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Class Mammalia
• Endothermic (warm blooded)
• Fur• Nurse young• 4 Chambered
Heart
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Mammals
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Subclass Monotremata
• Lay eggs
• Nurse young
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Duck Billed Platypus
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Platypus Egg
Babies
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Spiny Anteater
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Subclass Metatheria
• Marsupial
• Pouch
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Kangaroo
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Baby weighs about 1 gram (0.4 oz)
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Koala
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Baby Koala
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Oppossum
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Sugar Gliders
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Subclass Eutheria
Placental Mammals
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RodentsRodents
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Rodents
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RodentsRodents
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Cats
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DogsDogs
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BatsBats
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Marine MammalsMarine Mammals
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Manatees
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Farm animals
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Elephants
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