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ARTHROPODS HOLT CH. 29 PG. 701-711. ARTHROPOD CHARACTERISTICS Segmented body.

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Presentation on theme: "ARTHROPODS HOLT CH. 29 PG. 701-711. ARTHROPOD CHARACTERISTICS Segmented body."— Presentation transcript:

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 (1 st 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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 (1 st pair of appendages specialized for feeding) Modified into pincers or fangs PEDIPALPS-2 nd 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)


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