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Mammals
NG Ka Wai (Kary)6S 20
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What are the characteristics of a mammal?
hair or fur females feed their babies by suckling
milk (mammary glands ) sweat glands a backbone 3 middle ear bones for hearing warm blooded a specialized neocortex region in the
brain
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What are the Characteristics of Mammals?
Unique Mammal Characteristics
The females mammary glan☞ds produce milk feed the☞ ☞ir young ones
☞ Latin word☞Mamma=breast All mammals hair ☞Three bones in the middle ear
☞ malleus, incus, and stapes(which are more commonly known as the hammer, anvil and stirrups respectively)
General Characteristics of Mammals Jaws(all other vertebrates) mo☞re than one bone (mammals) a ☞single bone Mammals unique heart four ☞ ☞chambered heart(like birds)
☞ the main artery turns left ☞ In birds it turns to the right ☞ in all other vertebrates, there are
more than one artery that originate from the heartTwo sets of teeth
☞ replaced only onceA sheet of muscles and tendons
☞ diaphragm separates the thora☞cic cavity from the abdominal cavityA backbone vertebrates☞Warm blooded animals
☞ body temperature fluctuate with ✘that of the environment.
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Mammals Categories
Prototheria Metatheria Eutheria
lay eggs pouch placental mammals
In the biological cycle of marsupial animals the young ones are born very early. This is the reason why the young ones of marsupial animals complete their development cycle in their mother's pouch.
Most of the animals in this group are extinct.They are represented today by the platypus
The name Eutheria comes from the Greek words "well-developed" and the "beast". All living eutherians are placental mammals, the offspring are carried in the mother's uterus until fully developed.
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MonotremesMonotremes
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Duck-billed platypusDuck-billed platypus
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Duck Billed Platypus
Scientific Classification
Kingdom:Animalia Phylum:Chordata Subphylum:Vertebrata Class:Mammalia Order:Monotremata Family:OrthorhynchidaeGenus:OrnithorhynchusSpecies:Ornithorhynchus anatinus
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marsupial
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Placental MammalsPlacental Mammals
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Mammals’ sizeMammals vary greatly in size. The smallest mammal is the shrew with a body that is only a little more than 2 inches long and weighs less than some insects. In contrast, the largest mammal is the blue whale, which can sometimes measure up to 100 feet long and weigh as much as 150 tons
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The Evolution of Mammals
Fish are one of the most ancient animals. fish living near the shoreline began getting attracted towards land. Many of these fish eventually developed their fins into a leg-like structure, and also developed lungs for land breathing.
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Mammal Baby BornMammal Baby Born
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~The End~~The End~
Thank You !Thank You !