Zoology: Invertebrate Terms

  1. Ecdysozoa: clade containing nematoda and anthropoda

  2. Ecdysis: molting

  3. cuticle: a tough, flexible, and non-living outer layer that serves as a protective exoskeleton

  4. molting: shedding of exoskeleton during growth

  5. Nematoda: Phylum including nematodes and roundwords

  6. roundworm: Has 5 main distinction

    • pseudocoelomates with no serial segmentation

    • only have endoderm and ectoderm, no mesoderm (no muscle)

    • Dioecious reproduction

    • Parasitic nutrition, example: guinea worm

  7. pseudocoelom: have no true mesoderm, only endoderm and ectoderm

  8. hydrostatic skeleton: a skeletal system that relies on fluid pressure within a body cavity to provide support and enable movement.

  9. Coelom: fluid filled cavity, is surrounded by muscles that contract to change the shape of the cavity, thus creating movement. 

  10. guinea worm: Cyclops crustacean found in unfiltered water contains guinea worm larva. when cyclops is injested and digested, larva are released into the gut

  11. Arthropoda: Phylum

  12. exoskeleton: outer layer protecting and preventing water loss for the organisms

  13. metamorphosis

  14. chitin: flexible polysaccharide

  15. sclerotin

  16. jointed appendages: can be modified into/as wings, proboscis, and claws

  17. tagmosis: each segment is grouped into functional regions

  18. tagma: thorax, abdomen, head, trunk.

    • Insects have: 3 regions, head, thorax, and abdomen

    • Cephalothorax- the combined head and thorax

      • spiders, ticks, mites, and scorpions

    • Myriads- have a head and trunk

      • trunk = functionally a thorax and abdomen combined

        • centipedes

  19. hemolymph: blood of insects/arthopodes

  20. hemocoel: cavity where hemolymph is located

  21. tracheal system: includes the

  22. book lungs

  23. gills

  24. Cheliceriformes = Chelicerata

  25. cephalothorax

  26. abdomen

  27. chelicerae

  28. pedipalps

  29. Arachnida

  30. Myriapoda

  31. mandibles

  32. uniramous appendages

  33. head

  34. trunk

  35. Chilopoda

  36. Diplopoda

  37. Hexapoda

  38. Insecta

  39. thorax

  40. flight

  41. wings

  42. chewing mouthparts

  43. sucking mouthparts

  44. incomplete metamorphosis

  45. ametabolous

  46. egg

  47. young

  48. adult

  49. paurometabolous

  50. nymph

  51. hemimetabolous

  52. naiad

  53. complete metamorphosis

  54. holometabolous

  55. larva

  56. pupa

  57. Crustacea

  58. biramous appendages