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Title: Jun 6­3:35 PM (1 of 9)
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• Monotremes
• *Only egg laying mammals
• *Ex. platypus, anteater
• Marsupials
• *Bear young alive and carry in pouch until mature
• *Ex. Kangaroo, opossum, koala
• Placental Mammals
• *Bear young alive and nourish with placenta + umbilical cord
• *Ex. Moles, rabbits, bats, dogs, dolphins, humans Now for more on the 7 Vertebrate Classes...
Title: Jun 7­3:30 PM (2 of 9)
Agnatha "Jawless Fish"
Representatives
General Features
sea lamprey, hagfish
no jaws
unpaired fins
eel­like bodies
persists
cartilage skeleton
Integument
no scales
smooth, slimy skin
Food Getting and Digestion
lamprey sucker­like mouth with teeth parasite of fish
Circulatory System
Respiratory System
Movement
Reproduction
chambered heart
gills
lamprey swims in a manner
external fertilization
lamprey ­ larva, Title: Jun 11­4:39 PM (3 of 9)
Chondrichyes
"Cartilahenous Fishes"
Representatives General Features
Integument Food Getting and Digestion
Sharks, Skates, rays
Moveable jaws
paired fins
rough scales (tooth ­ like)
like sandpaper (no overlap)
lateral line (puts sense mvmt)
predator of fish mollusks +
lobster ; triangular teeth continuously + replaced Circulatory System chambered heart
Respiratory System gills shark ­ streamlined body + paired fins, move by moving tail and trunk side to side
Movement Reproduction
Title: Jun 11­5:08 PM (4 of 9)
shark ­ internal fertilization some are born alive, others lay fertilized eggs in Osteichthyes
"Bony Fishes"
Representatives
salmon, trout, eel, hake, tuna, seahorse
General Features
*largest class!* movable jaws
paired fins with bony ribs
Integument
smooth protective, overlapping scales, lateral line
Food Getting and
Digestion
various modes; typical GI tract + glands: liver, gall bladder, pancreas
Circulatory System
chambered heart
Respiratory System
gills covered by Movement
Reproduction
paired fins, side 2 side mvmt of tail + body; (depth)
external fertilization
eggs + milt
Title: Jun 11­5:47 PM (5 of 9)
Amphibia
"Amphibians" (2 Lives)
Representatives
frogs & toads (tailless)
salamanders & newts
General Features
born in water, adult lives on land (~ water);
feet often larva herbivorous+gills
adult carnivorous+lungs
Integument
thin, secretes many breathe through it
sensitive to pollutants
Food Getting and Digestion
Circulatory System
Respiratory System
frog tongue has sticky end to catch food; eyes drop down to chambered heart
~ gills & skin ~ lungs & skin
Movement
frogs & toads have long hind limbs for jumping
Reproduction
external fertilization
frog ­ tadpole metamorphosis
Title: Jun 11­6:01 PM (6 of 9)
Reptilia
"Reptitles"
Representatives turtles & tortoises
lizards & snakes
crocodiles, alligators, dinosaurs
General Features fully terrestrial vertebrates
amniotic egg (key ~ land)
do not require water for repro!
dry, scale­covered skin
clawed toes (except snake)
Integument
dry with scales
Digestion crocs & alligators ­ carnivores with sharp teeth; turtles have ­ omnivores; snakes ­ swallow rodents whole (while extends out) ­ fangs
Circulatory System
chambered heart in most
Respiratory System no gills, well dev. lungs, Food Getting and Movement Reproduction
limbs adapted for climbing, running, paddling, sidewinding
internal fertilization
fertilized egg is enclosed in thick, leathery waterproof to protect it from drying out; hatch as mini adults (no larva);
some lizards tail
http://video.google.com/videoplay?docid=603040711025579039Anaconda!
Title: Jun 11­6:09 PM (7 of 9)
Aves
"Birds"
Representatives
Birds
crow, pigeon, robin, sparrow, ostrich, lots of examples!
General Features
feathers and beaks
hollow, strong bones
large sternum for flight muscles
categorized ~ beaks and feet
Integument
feathers (insulate, protect, flight)
Food Getting and Digestion
beaks and feet vary ~ feeding habit; so they can store lots of food; muscular with stones they swallow to break food down into smaller pieces
Circulatory System
chambered heart
Respiratory System
lungs, air sacs ~ 1 way flow of ox
Movement
= wings for flying; = legs for perching, walking, prey­catching...
Reproduction
internal fertilization
large, shell­covered eggs are released and incubated and hatchlings are cared for by parent
mating behavior ~ dance, song
Title: Jun 11­6:27 PM (8 of 9)
Mammalia
"Mammals"
Representatives
human, cow, pig, mouse, rat, seal, dolphin, whale, bat, sloth, elephant, rhinoceros, monkey
General Features
to feed young
body covered with hair
sweat glands
teeth of 4 different types
diaphragm
well­developed brain, middle ear
almost all bear live young Integrument
hair, nails, hooves, sweat glands
Food Getting and Digestion
variety of feeding types; 4 types of teeth arranged ~ type of food; typically chew food, then GI tract
some whales ~ fish; largest have (plates) to strain plankton
Circulatory System
chambered heart
Respiratory System
lungs
Movement
Reproduction
4 limbs adapted ~ type of mvmt
ex. forelimbs in bats = wings; forelimbs in whales = flippers internal fertilization
lay eggs
marsupials immature so in pouch
95% placantal (have placenta + umbilical cord to nourish young protect + teach survival skills)
Title: Jun 11­6:37 PM (9 of 9)
Attachments
teethdiagrams.wpd