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ARTHROPODS

ARTHROPODS. HOLT CH. 29 PG. 701-711. ARTHROPOD CHARACTERISTICS. Segmented body. ARTHROPOD CHARACTERISTICS. Segmented body Jointed appendages. ARTHROPOD CHARACTERISTICS. Segmented body Jointed appendages Hard external skeleton. ARTHROPOD CHARACTERISTICS. Segmented body

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ARTHROPODS

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  1. ARTHROPODS HOLT CH. 29 PG. 701-711

  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. 710-711)

  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. 710-711) • Most do more good than harm (predators of insects)

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