Reminders Turn in HOURS HOURS are due TODAY Insect test retakes this week only! Grade worksheets in...
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Transcript of Reminders Turn in HOURS HOURS are due TODAY Insect test retakes this week only! Grade worksheets in...
![Page 1: Reminders Turn in HOURS HOURS are due TODAY Insect test retakes this week only! Grade worksheets in a few minutes Next week is Shark week, this week is.](https://reader035.fdocuments.us/reader035/viewer/2022070412/56649e385503460f94b283ae/html5/thumbnails/1.jpg)
RemindersTurn in HOURS HOURS are due TODAYInsect test retakes this week only!
Grade worksheets in a few minutesNext week is Shark week, this week is an introduction to all chordates/vertebrates.
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The Vertebrate Animals
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All Vertebrates are ChordatesPhylum chordata!
Chordates ALL have 4 characteristics sometime during their lives
a notochord
nerve cord
gill slits
a tail
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The non-vertebrate chordates - Tunicates
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Amphioxus
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About the Amphioxus song
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99% of chordates are vertebrates - Characteristics of Vertebrates
Bilateral Symmetry with 2 pairs of appendages,
cephalization (sense organs concentrated in a head region)
True body cavity
closed circulatory system.
Endoskeleton including a vertebral column
Well developed body systems.
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CartilageBonyAmphibianReptileBirdMammal
Comparative Numbers of Species
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Classes of Vertebrates
Jawless fish
Cartilaginous Fishes
Bony Fish
Amphibians
Reptiles
Birds
Mammals
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Jawless Fish
Primitive, no paired fins
no bone, all cartilage
Lamprey – a parasite
Hagfish – scavenger, also called slime eel.
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Jawless Fish
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Cartilage Fish
Sharks, skates, rays
750 species
Ventral mouth
Spiral valve increases surface area
Massive liver (up to half body weight)
skin with tooth-like scales
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Cartilage Fish
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Bony Fish
20-30,000 species
Appeared 400 million years ago
Cold blooded, flat scales, swim bladder
gills and gill cover
Most lay eggs
eyes usually on the side of the head
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Bony Fish
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Amphibians
2000 species, appeared 350 million years ago.
Cold-blooded, moist skin, lungs, no claws
Lay jellylike eggs
Life cycle includes a larval stage
90% are frogs and toads
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Amphibians
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Reptiles
6500 species, appeared 300 million years ago.
Cold-blooded, hard shelled eggs, internal fertilization
Body covered with scales.
Include crocodilians, lizards and snakes, turtles and the tuatara
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Reptiles
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Birds
8600 species, appeared 130 million years ago.
Warm blooded, 4 chambered heart
Feathered dinosaurs
Feathers, crop, oil glands, hollow bones, fused skeleton---all adaptations for flight.
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Birds
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Mammals
First appeared 180 million years ago
4500 species, most are placental.
2 primitive orders; monotremes and marsupials
Diaphragm, hair, mammary glands, lips, different kinds of teeth, external ears.
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Mammals
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Vert./Chordate Quiz Tuesday!!!
For more information 7 Vertebrate Classes.docOn WBP and Shared drive
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The Vertebrate Animals
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