1 / 60

Class mammalia – “breasted” animals

Class mammalia – “breasted” animals . Mammalogy. study of mammals. Traits . Mammary glands – produce milk. Traits . Hair (or fur). Traits . 4 chambered heart . Traits . endotherms. Traits . Diaphragm . Traits . Heterodonts – different teeth. Traits . 7 neck vertebrae. Traits .

anais
Download Presentation

Class mammalia – “breasted” animals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Class mammalia – “breasted” animals

  2. Mammalogy • study of mammals

  3. Traits • Mammary glands – produce milk

  4. Traits • Hair (or fur)

  5. Traits • 4 chambered heart

  6. Traits • endotherms

  7. Traits • Diaphragm

  8. Traits • Heterodonts – different teeth

  9. Traits • 7 neck vertebrae

  10. Traits • Viviparous – live birth

  11. Traits • External fleshy ear lobes

  12. Traits • Well developed brain

  13. Advantages of mammals

  14. Temperature regulation • Allows mammals to be active at any time, fur and fat keep heat in, sweat, panting, and ears cool them off

  15. Intelligence • Smartest animals, can learn from experience

  16. Respiration • Good lungs, diaphragm can move air in and out more efficiently

  17. Care for young • Provide milk, teach young how to get food and escape predators

  18. Classification • Based on teeth, limbs, and reproduction

  19. Teeth • Heterodonts – have different kinds of teeth to eat different things

  20. Canines • Fangs for tearing (usually meat)

  21. Molars • Chewing and grinding

  22. Incissors • front teeth for biting things off

  23. Limbs • Vary greatly within the class depending on their use

  24. Reproduction • 1st consideration in classifying Monotremes Marsupials Placentals

  25. Gestation • Period of time the embryo is in the uterus receiving nutrients from the mother

  26. Monotremes • “one opening” cloaca – egg laying mammals, no gestation • E.g. – platypus, echidna

  27. Platypus

  28. Echidna (spiny anteater) Short beak Echidna Long beak Echidna

  29. Marsupials • Pouch mammals, brief gestation, born very immature and then develop in a pouch • E.g. – kangaroo, koala, opossum

  30. Placentals • (95% of mammals), long gestation, born better developed • Humans, dogs, deer

  31. Orders of Placental Mammals Insectivora Lagomorphia Cetacea Chiroptera Carnivora Proboscidea Edentata Pinnipedia Ungulates Rodentia Sirenia Primates

  32. Insectivora • “insect eaters” – most primitive placentals • E.g. – shrews, moles

  33. Star-nosed mole

  34. Chiroptera • “hand wings” – only flying mammals • E.g. - bats

  35. Vampire bats

  36. Flying foxes – worlds largest bats 5 foot wingspan

  37. Edentata • “no teeth” – reduced teeth, large claws • E.g. – anteaters, sloths, armadillos

  38. Anteater skull

  39. Rodentia • “gnawing teeth” – 2 pairs of continuously growing gnawing incisors, largest order of mammals • E.g. – beaver, ground hog, mice, rats

  40. Hard foods file the teeth down – what would happen if they ate only soft foods?

  41. Naked mole rat

  42. Lagomorpha • 4 pairs of gnawing incisors, jumping hind legs • E.g. – rabbits, hares, pika

  43. Rather than chew the cud… • Reinjest their own droppings to get the most nutrients from their food

  44. Carnivora • “meat eaters” – prominent canines, claws • E.g. – cats, dogs, bears

  45. Pinnipedia • “feather foot” – carnivores, amphibious, have flippers • E.g. – seals, walruses

  46. Fighting Walruses

  47. Sirenia • “temptress” – aquatic, flippers, fluke, herbivores, blubber • E.g. – manatees

  48. Protected

  49. Cetacea • Aquatic, flippers, fluke, blubber, blowhole, high intelligence (whales and dolphins) • Toothed whales – killer whales • Baleen whales – gray whales

More Related