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Invertebrate Phylum Arthropoda

Invertebrate Phylum Arthropoda. Vocabulary Cephalization = concentration of nerve tissue at anterior end of organism Molting = periodic shedding of exoskeleton to allow for growth Chelicerae = pincher-like mouth parts. Vocabulary

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Invertebrate Phylum Arthropoda

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  1. Invertebrate Phylum Arthropoda

  2. Vocabulary Cephalization = concentration of nerve tissue at anterior end of organism Molting = periodic shedding of exoskeleton to allow for growth Chelicerae = pincher-like mouth parts

  3. Vocabulary Mandibles = chewing mouth parts adapted for piercing and sucking Appendages = extensions of body parts; legs and antennae Cephalothorax = fused head and thorax

  4. Vocabulary Pedipalps = sense appendage for holding and transporting food; carry sperm Chitin = complex carbohydrate; fungi cell wall, arthropod exoskeleton

  5. Characteristics * Segmented bodies with paired, jointed appendages * Chitinous exoskeleton * Bilateral symmetrical coelomates * Must molt to grow * Open circulatory system * High degree of cephalization * Ventral nerve cord

  6. Four Subphylum: Chelicerata - horseshoe crabs, sea spiders, spiders, scorpions, ticks, mites * spiders - chelicerae modified asfangs that inject venom; spin silk

  7. Crustacea - crabs, lobsters, shrimp, crayfish, barnacles, water, fleas * branched antennae; pair of mandibles; respire with gills

  8. Uniramia – centipedes (bite), millipedes (herbivores), all insects * antennae, mandibies, unbranched appendages (Trilobita) - extinct organisms called trilobites

  9. Antenna Rostrum Anternnule Cheliped Compound eye Carapace Head Cephalothorax Walk Legs Thorax Abdomen Uropod Telson

  10. Mouth Mandible Maxilla Maxilliped

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