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Published byDoris Eleanor Johnson Modified over 9 years ago
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Mammals
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Cats, whales, moles, bats, horse, people, platypus, kangaroos
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Mammals produce milk and nurse their young
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Many have scent glands that are used for marking territories or defense
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Specialized teeth which are replaced only once in a lifetime
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carnivores Herbivores omnivores
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Most have sweat glands and sebaceous (fat secreting) glands
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Highly developed brain and nervous system
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3 middle ear bones external ear flaps called pinnae
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Smallest: a bat weighing.05 oz Pigmy shrew Hognose bat (aka bumblebee bat)
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Largest: BlueWhale
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Three subclasses Monotremes Marsupials Placentals
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Monotremes: egg laying mammals no nipple to nurse from leathery egg shells
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Name (Monotreme) means “one opening” for a cloaca (urinary and reproductive opening is the same) left and right side of brain are not connected. Don’t have actual teeth- grind food with flat plates Echidna -puggle
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Have a 6th sense in their bill: can detect small electrical currents
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Marsupials Offspring born prematurely Baby crawls to mother’s mammary gland in a pouch Finishes gestation at the mother’s teat
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Left and right side of brain are not connected Epibubic bones are usually present Right aortic arch is absent and red blood cells lack nuclei Herbivores Bandicoot KoalaWombat Tasmanian Devil
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Live primarily in Australia, Tasmania, and New guinea In U.S. : opossum
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Placentals entire gestation is inside the mother embryo is fed from the mothers body
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16 Orders- These are a few Chiroptera: Bats Carnivore Artiodactyla Rodentia Cetaceans Sirenia Proboscidea Primates Dermoptera (gliding lemurs) Perissodactyla Insectivores Edentates
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Chiroptera: Bats second largest order of mammals wide variety of teeth – based on diet examples: fruit bat, vampire bat only flying mammals
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fly at speeds up to 65 km/hr See by echo location
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Carnivore All eat meat On top of the food chain Examples: lions, tiger, bears, wolves, cheetah Pacific northwest is carnivore territory learned to adjust to human presence
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Artiodactyla examples: antelope, deer fast running all have even number of toes each toe encased in a horny hoof all are herbivores
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Rodentia includes beavers, chipmunks, mice, porcupines, squirrel produce large litters each year large incisors that continue to grow though out life largest order of mammals and most successful most are omnivores
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Cetaceans all must come out of water to breathe Use echo-location to navigate and communicate Includes whales, dolphins and porpoises longest flippers: humpback whale fastest: bull Orca
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Cetaceans con’t smallest: dolphins and porpoises largest: whalesdolphins
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narwhal has the biggest teethbiggest teeth
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sperm whale dives the deepest heaviest brain: sperm whale
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A group of these is called a pod blowholes identify them
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Sirenia means mermaid-like appearance (inspired by manatess when seen from ships) examples: manatees and dugong herbivores small bones live entire life in water endangered
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Proboscidea elephants extinct: mammoths and mastodons largest land animals trunks for spraying water, carrying food, smelling, lifting, tusks are extra long incisors on upper jaw large ears
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Primates example: humans, apes, monkeys all have opposable thumbs binocular vision with eyes facing forward usually no more than three offspring per year visual acuity and color perception
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Dermoptera (gliding lemurs) membrane from neck to fore paws to back feet to tail don’t fly – they glide from tree to tree live in trees diet is fruit and leaves nocturnal endangered also called colugo
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Perissodactyla examples: horse, zebra, rhinoceroses, tapirs tapirs all have an odd number of toes herbivores grazing animals flat teeth rudiment stomach for digesting cellulose (4 stomaches )
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Insectivores moles and shrews all eat ONLY insects
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Edentates giant anteaters, armadillos and tree sloths have NO teeth but still feed on insects
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