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Mammalian Adaptations

Mammalian Adaptations. MONOTREMES “Egg laying”. Duckbilled Platypus Anteater Echidna. MARSUPIALS Premature babies develop in pouch. Found in Australia/ New Guinea Kangaroo Wallaby. MARSUPIALS. Only North American Marsupial Oppossum. PLACENTAL Embryos nourished inside mother by placenta.

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Mammalian Adaptations

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  1. Mammalian Adaptations

  2. MONOTREMES“Egg laying” Duckbilled Platypus Anteater Echidna

  3. MARSUPIALSPremature babies develop in pouch Found in Australia/ New Guinea • Kangaroo • Wallaby

  4. MARSUPIALS Only North American Marsupial • Oppossum

  5. PLACENTALEmbryos nourished inside mother by placenta 95% of all mammals are placental At least 18 orders

  6. TEETH Incisors- Chisel like teeth for cutting Canines- Pointed teeth for puncturing/tearing Premolars- Shred and grind Molars- Flat teeth for grinding, crushing

  7. Specialized teeth vary with diet

  8. Grass eaters have different teeth than carnivores

  9. SALIVARY GLANDS • DIGESTION starts in the MOUTH Image from: http://www.entnet.org/healthinfo/throat/salivary.cfm

  10. BALEEN Thin keratin plates that hang from the roof of the mouth and screen food from water Image from: http://home.iprimus.com.au/readman/whale.htm

  11. ECHOLOCATION Bats can fly without eyes, but NOT without ears Bats emit high frequency sound waves that bounce off objects Can determine size, distance, direction, speed

  12. RUMEN In cud chewers like cows, sheep, goats, giraffes First chamber of stomach containing bacteria to digest plants Image from:http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/herbivores/rumen_anat.html

  13. CECUM In non cud chewers like horses, rabbits, rodents, elephants Small pouch off small intestine containing bacteria to digest plants

  14. Human appendix is vestigial cecum

  15. Larger Brain Grasping hand with fingernails instead of claws 2 forward facing eyes PRIMATES • Includes: • Gorillas • Monkeys • Lemurs

  16. PRIMATES Humans are primates too!

  17. PINNIPEDS Carnivorous streamlined body flipper limbed Seals Walruses Sea lions

  18. UNGULATESMammals with Hooves

  19. CETACEANS Includes: whales, dolphins, porpoises

  20. CHIROPTERA BATS Only mammals that can fly

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