mammals! · 2018. 9. 10. · capybaras, and other gnawing mammals . mouse . rats. porcupines ....
TRANSCRIPT
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Mammals!
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What Makes a Mammal a Mammal?
• Air Breathing• Vertebrate• Warm Blooded (endothermic)• Hair covered bodies• 3 Middle Ear Bones • Mammary glands that function in mother hood
(breast milk produced for young) .
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• Most have sweat glands• Specialized teeth for chewing.• Placenta that is used to feed offspring
during gestation (time when infants are in the mother’s uterus)
• Mammalian brain is the most advanced for regulating body systems
• 4 chambered heart and red blood cells for oxygen transport.
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• Mammals range in size from the 30–40 millimeter bumblebee bat to the 33-meter blue whale.
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Reproduction
• Except for the monotreme mammals, which lay eggs, all living mammals will give birth to live young.
Platypus Short Beaked Echidna
Long Beaked Echidna
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Reproduction • The young will develop in the
uterus of the mother for different times depending on the species.
• The shortest gestation is 12-13 days in the Virginian opossum. However the young are not fully developed and must live in the mothers pouch for several weeks before being able to survive away from their mother.
• The longest gestation is 660-760 days for the African Elephant. Young are born able to walk.
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Groups of Mammals
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1) Rodentia
• The rodents• Includes mice, rats, porcupines, beavers,
capybaras, and other gnawing mammals
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Mouse
Rats
Porcupines
Capybara
Beaver
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2) Chiroptera
• Bats• Forelimbs have become webbed, which makes
them the only mammals truly capable of flight. • Most each insects, followed by fruit. • There is one species on the coast of California
which will eat fishand crustaceans.
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3) Soricomorpha
• Includes shrews, moles and solenodons.• A Solenodon is a burrowing, nocturnal,
venomous and insectivorous animal. They are only found in Cuba or Haiti.
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Cuban Solenodon
Haitian Solenodon Shrew Mole
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4) Primates
• Includes the human species, Homo Sapiens.• Most primate types are found in tropical/sub
tropical areas. • There are 2 groups found in the primates:• Prosomians and Simians
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Prosomians
• Lemurs • Lorises• Galagos• Tarsiers
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Simians • Monkeys• Gibbons• Apes• Chimps• Gorillas
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5) Cetartiodactyla• Large groups that includes a
variety of animals:• Whales and dolphins is one
grouping.• ‘Even toed ungulates’ are the
other group. These include animals such as pigs, deer, hippos, etc. Essentially any 4 legged animal with even amounts of toes.
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6) Carnivora
• Primarily meat eaters and mothers raise the young.
• Includes dogs, cats, weasels, bears, and seals.• The smallest member of carnivora is the least
weasel at as little as 25 grams.• The largest members are the polar bear, which
can weigh up to 1,000 kilograms and the southern elephant seal which can weight up to 5,000 kilograms.
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Mammals!What Makes a Mammal a Mammal?Slide Number 3Slide Number 4Reproduction Reproduction Groups of Mammals 1) Rodentia Slide Number 92) Chiroptera 3) SoricomorphaSlide Number 124) PrimatesProsomiansSimians �5) Cetartiodactyla6) Carnivora Slide Number 18