1. ARTHROPODS
HOLT CH. 29 PG

2. ARTHROPOD CHARACTERISTICS
Segmented body

3. ARTHROPOD CHARACTERISTICS
Segmented body
Jointed appendages

4. ARTHROPOD CHARACTERISTICS
Segmented body
Jointed appendages
Hard external skeleton

5. ARTHROPOD CHARACTERISTICS
Segmented body
Jointed appendages
Hard external skeleton
Most have open circulatory system

6. ARTHROPOD CHARACTERISTICS
Segmented body
Jointed appendages
Hard external skeleton
Most have open circulatory system
Many have wings

7. SEGMENTED BODY
Individual body segments in larval stage

8. SEGMENTED BODY Individual body segments in larval stage
Adults show 3 body segments
Head
Thorax (chest)
Abdomen
SOME display CEPHALOTHORAX (head and chest fused together)

9. JOINTED APPENDAGES
APPENDAGE-structure that extends form arthropod’s body wall

10. JOINTED APPENDAGES
APPENDAGE-structure that extends form arthropod’s body wall
ARTHROPOD=“jointed foot”

11. EXOSKELETON EXOSKELETON-made of carbohydrate CHITIN-thin/flexible
Muscles attach
Appendages attach

12. EXOSKELETON EXOSKELTON-made of carbohydrate CHITIN-thin/flexible
Muscles attach
Appendages attach
WATERPROOF

13. EXOSKELETON EXOSKELTON-made of carbohydrate CHITIN-thin/flexible
Muscles attach
Appendages attach
WATERPROOF
PROTECTION

14. REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings

15. REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream

16. REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
Aquatic arthropods breath with gills

17. REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
Aquatic arthropods breath with gills
OPEN CIRCULATORY SYSTEM

18. REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
Aquatic arthropods breath with gills
OPEN CIRCULATORY SYSTEM
Terrestrial arthropods breath with BOOK LUNGS

19. FEEDING/DIGESTION/ EXCRETION
Many mouthparts/appendages for taking in food

20. FEEDING/DIGESTION/ EXCRETION
Many mouthparts/appendages for taking in food
MALPIGHIAN TUBULES-excretory system of arthropods-

21. FEEDING/DIGESTION/ EXCRETION
Many mouthparts/appendages for taking in food
MALPIGHIAN TUBULES-excretory system of arthropods-
Waste leaves through anus

22. COMPOUND EYE
Composed of thousands of individual visual units

23. COMPOUND EYE Composed of thousands of individual visual units
SOME also have simple eyes (single lenses)-see only light and dark, not images

24. LIFE CYCLE
Most reproduce sexually

25. LIFE CYCLE
Most reproduce sexually
Usually internal fertilization

26. LIFE CYCLE Most reproduce sexually Usually internal fertilization
Many have specialized reproductive organs

27. LIFE CYCLE Most reproduce sexually Usually internal fertilization
Many have specialized reproductive organs
MOLTING-shedding of exoskeleton to allow for growth

28. GROUPS OF ARTHROPODS
4 main groups (SUBPHYLA of phyla ARTHROPODA)

29. GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla ARTHROPODA)
HEXAPOD-insects

30. GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla ARTHROPODA)
HEXAPOD-insects
MYRIAPODA-millipeds/centipedes
CRUSTACEA-lobsters/shrimp

31. GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla ARTHROPODA)
HEXAPOD-insects
MYRIAPODA-millipeds/centipedes
CRUSTACEA-lobsters/shrimp
CHELICERATA-spiders

32. GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla ARTHROPODA)
HEXAPOD-insects
MYRIAPODA-millipeds/centipedes
CRUSTACEA-lobsters/shrimp
CHELICERATA-spiders
SEE PG. 705!!!

33. GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla ARTHROPODA)
HEXAPOD-insects
MYRIAPODA-millipeds/centipedes
CRUSTACEA-lobsters/shrimp
CHELICERATA-spiders
SEE PG. 705!!!

34. SUCCESS OF ARTHROPODS
More arthropods than all other animal groups COMBINED

35. SUCCESS OF ARTHROPODS
More arthropods than all other animal groups COMBINED
More than 5 million species identified (and growing)

36. SUCCESS OF ARTHROPODS
More arthropods than all other animal groups COMBINED
More than 5 million species identified (and growing)
Exoskeleton provides protection (land and water)

37. SUCCESS OF ARTHROPODS
More arthropods than all other animal groups COMBINED
More than 5 million species identified (and growing)
Exoskeleton provides protection (land and water)
Wide range of food sources and habitats

38. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)

39. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs

40. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS

41. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS

42. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
No antennae
CEPHALOTHORAX (head chest)

43. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
No antennae
CEPHALOTHORAX (head chest)
ABDOMEN (belly)

44. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
No antennae
CEPHALOTHORAX (head chest)
ABDOMEN (belly)
ARACHNIDS-largest class

45. ARACHNIDS
SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding)
Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
No antennae
CEPHALOTHORAX (head chest)
ABDOMEN (belly)
ARACHNIDS-largest class

46. CLASS ARACHNIDA
All (except some mites) are carnivores

47. CLASS ARACHNIDA All (except some mites) are carnivores
Most terrestrial

48. CLASS ARACHNIDA All (except some mites) are carnivores
Most terrestrial
Don’t have jaws (consume only liquid food)

49. CLASS ARACHNIDA All (except some mites) are carnivores
Most terrestrial
Don’t have jaws (consume only liquid food)
Enzymes turn prey into liquid (see pg )

50. CLASS ARACHNIDA All (except some mites) are carnivores
Most terrestrial
Don’t have jaws (consume only liquid food)
Enzymes turn prey into liquid (see pg )
Most do more good than harm (predators of insects)

51. SPIDERS
Chelicerae of spiders modified into fangs

52. SPIDERS Chelicerae of spiders modified into fangs
Poison glands secrete toxins (kills/paralyzes prey)

53. SPIDERS Chelicerae of spiders modified into fangs
Poison glands secrete toxins (kills/paralyzes prey)
2 poisonous species in US
BLACK WIDOW
BROWN RECLUSE

54. SPIDERS Chelicerae of spiders modified into fangs
Poison glands secrete toxins (kills/paralyzes prey)
2 poisonous species in US
BLACK WIDOW
BROWN RECLUSE
SPINNERETS-appendages at end of abdomen-secrete sticky silk strands

55. BROWN RECLUSE

56. BLACK WIDOW

57. BLACK WIDOW VIDEO

58. SCORIONS/MITES/TICKS
SCORPIONS-segmented abdomen ending in venomous stinger
Grasping pincers-seizing food and sexual reproduction

59. SCORIONS/MITES/TICKS
SCORPIONS-segmented abdomen ending in venomous stinger
Grasping pincers-seizing food and sexual reproduction
MITES/TICKS-head, thorax and abdomen fused into single unsegmented body
Most not harmful
Can spread viral/fungal infections (ex. Lyme’s disease)

60. SCORIONS/MITES/TICKS
SCORPIONS-segmented abdomen ending in venomous stinger
Grasping pincers-seizing food and sexual reproduction
MITES/TICKS-head, thorax and abdomen fused into single unsegmented body
Most not harmful
Can spread viral/fungal infections (ex. Lyme’s disease)
HORSESHOE CRAB-
Ancient group of invertebrates (400 million years)

61. SUBPHYLUM CRUSTACEA
Most marine, some fresh water

62. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN

63. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN
Appendages on abdomen

64. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN
Appendages on abdomen
Have mandibles for feeding and two antennae

65. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN
Appendages on abdomen
Have mandibles for feeding and two antennae
Breathe with gills

66. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN
Appendages on abdomen
Have mandibles for feeding and two antennae
Breathe with gills
CARAPACE-exoskeleton of cephalothorax

67. SUBPHYLUM CRUSTACEA Most marine, some fresh water
CEPHALOTHORAX (head chest) and ABDOMEN
Appendages on abdomen
Have mandibles for feeding and two antennae
Breathe with gills
CARAPACE-exoskeleton of cephalothorax
NAUPLIUS-larval form (molts to become adult)

68. TERRESTRIAL CRUSTACEANS
Sand fleas, isopods, land crabs (only PARTIALLY adapted for land-tied to ocean)

69. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),

70. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)

71. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)
CARAPACE-’hood’ over cephalothorax

72. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)
CARAPACE-’hood’ over cephalothorax
LARVA=nauplius (MOLTS several times to allow for growth)

73. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)
CARAPACE-’hood’ over cephalothorax
LARVA=nauplius (MOLTS several times to allow for growth)
FOOD CHAIN-fairy shrimp, water fleas, krill

74. AQUATIC CRUSTACEANS
Fairy shrimp, water fleas, copepods (most abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)
CARAPACE-’hood’ over cephalothorax
LARVA=nauplius (MOLTS several times to allow for growth)
FOOD CHAIN-fairy shrimp, water fleas, krill
SESSILE-barnacles

75. DECAPODS
LARGEST GROUP OF CRUSTACEANS
CHELIPEDS-pinchers

76. DECAPODS LARGEST GROUP OF CRUSTACEANS Shrimp, crayfish, crab, lobsters
CHELIPEDS-pinchers
SWIMMERETS-swimming legs on ventral abdomen

77. DECAPODS LARGEST GROUP OF CRUSTACEANS Shrimp, crayfish, crab, lobsters
CHELIPEDS-pinchers
SWIMMERETS-swimming legs on ventral abdomen
UROPOD-flattened tail on posterior end (swim backwards)