1. Mammals Chapter 45

8. Extinct species

10. Characteristics of Mammals mammary glands to feed young body covered with hair or fur live birth lung breathing endothermic diaphragm breathing muscle four chambered heart seven cervical vertebrae pectoral and pelvic girdles- two pairs of limbs highly developed brain cerebrum (emotions) cerebellum (equilibrium and movement)

11. Endothermy

12. Respiratory System

13. Heart comparison Fish Frog Mammal

14. Circulatory System

15. Nervous System

16. Mammal Brain

18. 18 Mammal Orders There are 19 orders of mammals in the class Mammalia in which 17 nourish unborn young in the placenta, egg laying mammals and marsupials

19. 19 Monotremes and Marsupials Only 5 percent of all mammalian species are in the orders Monotremata and Marsupialia.

20. 20 Monotremata Oviparous or egg laying mammals Only 3 in existence Duck-billed platypus and two species of spiny anteaters called echidna. Not completely endothermic (their body temperature is lower and fluctuates more than other mammals )

21. 21 Marsupials Marsupials give birth to tiny immature young that crawl to a pouch on the mothers belly immediately after they are born.

22. 22 They attach themselves to milk secreting nipples nursing until they are mature enough to survive outside the pouch.

23. 23 250 species of marsupial species exist in Australia, New Guinea, Tasmania, And the Americas. Tasmanian Devil

24. 24 American Marsupial

25. 25 Placental Mammals

26. 26 Characteristics of Placentals Placental mammals carry unborn young in the uterus until young can survive in the wild. Oxygen and nutrients are transferred from mother’s blood to baby’s blood

27. 27 Placental Characteristics The placenta is a membrane providing nutrients and waste & gas exchange between the mother and developing young Gestation period-is the time which mammals develop in mother’s uterus

28. Classification of Mammals- teeth

29. foot structure

30. toes and fingers, claws and nails

31. Insectivora

32. Chiroptera

33. Rodentia

34. Lagomorpha

35. Edentata

36. Cetacea

37. Sirenia

38. Proboscidea

39. Carnivora

40. Perissodactyla

41. Artiodactyla

42. Primates

43. Anthropoids