The Vertebrates. Vertebrate Characteristics Vertebrae (backbone) Notochord (flexible dorsal rod) ...
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Transcript of The Vertebrates. Vertebrate Characteristics Vertebrae (backbone) Notochord (flexible dorsal rod) ...
![Page 1: The Vertebrates. Vertebrate Characteristics Vertebrae (backbone) Notochord (flexible dorsal rod) Nerve cord (hollow) with brain Three layers of.](https://reader035.fdocuments.us/reader035/viewer/2022062410/56649efe5503460f94c13223/html5/thumbnails/1.jpg)
The Vertebrates
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Vertebrate Characteristics
Vertebrae (backbone) Notochord (flexible dorsal rod) Nerve cord (hollow) with brain Three layers of cells as an embryo Coelom (body cavity) Tissues and organs Endoskeleton
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What are the 5 vertebrate animal groups?
FISHAMPHIBIANSREPTILESBIRDSMAMMALS
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The Vertebrate species breakdown:
Number of Species Described
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Number
FishReptilesAmphibiansBirdsMammals
On a sheet of paper, make a list of as many animals as you can think of from each of the
five groups.
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The Vertebrate species breakdown:
Number of Species Described
0
5000
10000
15000
20000
25000
Number
FishReptilesAmphibiansBirdsMammals
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The Animal Kingdom species breakdown:
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Species
PoriferaCnidariansPlatyhelminthesNematodaAnnelidaEchinodermataMolluscaArthropodaFishReptilesAmphibiansBirdsMammals
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The Animal Kingdom species breakdown (without insects):
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Species
Porifera
Cnidarians
Platyhelminthes
Nematoda
Annelida
Echinodermata
Mollusca
Arthropoda (w/ oinsects)Fish
Reptiles
Amphibians
Birds
Mammals
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FISH 3 Classes
I. Agnatha
(Jawless fish)
Lamprey eels
Hagfishes
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FISH
3 Classes
II. Chondrichthyes
(Cartilaginous fishes)
Sharks,Rays,Skates
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• Rays are viviparous (bearing live young)
• Skates are oviparous (laying eggs).
• Skates have one or two dorsal fins
• Rays generally do not have a dorsal fin
• Rays have flat plate-like teeth.
• Skates have cusped teeth.
Ray versus Skate
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FISH 3 Classes
III. Osteichthyes
(Bony Fish)
20,000 species!
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Fish Facts
• Use gills to breathe and swim bladder for depth• Have scales• Jaws and Bony skeleton• Vertebrae provide flexibility (mobility)• 2-chambered hearts• most have external fertilization• highly developed sensory systems & smell
– lateral line system: fluid-filled canals that allow detection of movement and vibration
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AmphibiansAmphibians
“double life” they start as
aquatic larva and grow into a
terrestrial adult!
FROGS
TOADS
CAECILIANS
NEWTS
SALAMANDERS
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AMPHIBIAN FACTS
• Ectotherms (body temp = surroundings)
• Metamorphosis (tadpole to frog)
• 3-chambered heart for more energy
• Breathe through skin (so must stay moist)