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Class Mammalia By Mrs. Souza

Class Mammalia By Mrs. Souza. Mammil = milk fed. Characteristics. Warm-blooded Have hair 3 distinct ear bones Modified mammary glands to provide milk to offspring. Main Groups. Subclass Eutheria (placental mammals) Subclass Metatheria (marsupials)

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Class Mammalia By Mrs. Souza

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  1. Class MammaliaBy Mrs. Souza Mammil = milk fed

  2. Characteristics • Warm-blooded • Have hair • 3 distinct ear bones • Modified mammary glands to provide milk to offspring

  3. Main Groups • Subclass Eutheria (placental mammals) • Subclass Metatheria (marsupials) • Subclass Prototheria (egg laying) • 19 orders within the subclasses

  4. Monotremes and Marsupials Only 5 percent of all mammalian species are in the orders Monotremata and Marsupialia.

  5. Placental Mammals • The placenta is a membrane providing nutrients and waste & gas exchange between the mother and developing young

  6. Feeding • All produce milk for young • Consumers – eating a wide variety of organisms (animals, plants, fungi) • Carnivores – species with O. Carnivora • Herbivores – species in O. Artiodactyla • Omnivores – species O. Primatia

  7. Body Plan and Symmetry • Bilaterally symmetrical • Warm-blooded • Major organ systems to circulate blood and oxygen (heart, brain, lungs, internal skeleton) • Modified appendages for their habitat

  8. Respiration • Lungs • The lungs of mammals have a spongy texture and are honeycombed with epithelium • Breathing is driven by the diaphragm

  9. Response • Central nervous system with a brain • Hearing is well-developed • Sense through modified hair (whiskers) • Communicate through sound

  10. Movement • Locomotion styles are diverse: mammals may swim, run, bound, fly, glide, burrow, or climb as a means of moving throughout their environment. • Some mammals live in groups of tens, hundreds, thousands or more individuals. Other mammals are generally solitary except when mating or raising young.

  11. Lifespan • Smaller mammals live short lives and larger mammals live longer lives. • Bats are an exception, live one or more decades • Range from 1 year to 70 years

  12. Quiz Questions • What characteristic separates Class Mammalia into 3 Subclasses? • How do mammals gather oxygen and release carbon dioxide? • What are three characteristics that separate Class mammalia from other vertebrates?

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