Animal Diversity Test 2-Platyhelminthes

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Animal Diversity Test 2-Platyhelminthes
2010-10-17 14:05:38

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  1. Platyhelminthes are what?
  2. Type of coeloms?
    Acelomates-No cavity lined with peritoneum
  3. Only internal organ?
    Digestive tube
  4. Mesoderm cosists of?
    Muscle fibers-replaces mesoglea
  5. Type of symmetry?
  6. Top side (name)?
  7. Bottom side (name)?
  8. Center of nervous system is the..?
  9. Three germ layers
  10. Mesoderm makes what possible?
    Elaborate organs
  11. Pair of cerebral what?
  12. Type of system organization
  13. Pair of cerebral ganglion are located?
    anterior end
  14. Type or nervous stystem
  15. Light sensitive
    Eyespots (ocelli)
  16. Excretory cells
    Flame cells
  17. Protonephridia
    Primative excretary system. Osmoregulated attached to two canals.
  18. Mouth is located where?
  19. Pharynx does what?
    Excretes undigested food
  20. Digestion type
    extracellular and intracellular
  21. Diffusion
    How they respire-diffusion
  22. What is absent?
    Circulatory system
  23. Sexually they are?
    Monecious-Both sexual organs present
  24. Can also reproduce?
    Asexually by fission
  25. Class of Platyhelminthes?
  26. Planarians are?
    Free-livings Tubellaria, bottom dwellers, marine and freshwater or moist environments (under stones).
  27. Planarian locomotion?
    Ciliated epidermis, moves on slime layer
  28. Metabolic wastes move by?
    Diffusion through body wall
  29. planarians respire?
    Gas exchange by difussion through body surface
  30. Planarian reproduction
    Aasexual, regeneration, fission
  31. Picture of a Planarian
  32. Planarians sexual organs
    Monoecious, hermaphroditic-also cross fertilization
  33. Another common name for planaria?
  34. Cestoda?
  35. How many hosts for cestoda/
    Usually two
  36. Grooves of proglottids are by?
    Weakened muscles
  37. Cestoda have what to increase surgace area?
    Microtriches-to increase nutrients uptake-like little roots
  38. Sexually-cestoda
  39. Cestoda-Scolex
    Hold-fast organ for attachment
  40. Cestoda-how many sense organs?
  41. Cestoda-Rostellum
    Tip of scolex-may or may not have hooks, used to aid in attachment and scraping intestinal cells
  42. Proglottids-3 stages
    • Mature-Contain sex organs
    • Gravid-Terminal, shelled, infected larvae (ready to germinate)
    • Detached-Gravid proglottid shed in feces-Life cycle starts again
  43. Picture of a cestoda
  44. Genus species of beef tapeworm
    Taenia saginata
  45. Characteristics of Taenia saginata
    • No hooks, suckers to attach to intestine,
    • juveniles found in intermuscular tissue of cattle
    • Cysticerci-measly beef-encyst juveniles
    • Develop in cattle, reproduce in humans
  46. % of cattle infected
  47. Pork Tapeworm
    Taenia solium
  48. Taenis solium have what on rostellum?
    Hooks and suckers
  49. Life cycle of taenia solium in humans
    • Adults>small intestine humans>burrow throught to intestinal wall
    • >to blood and lymph
  50. Taenia solium juveniles live where
    Muscles in pigs
  51. How are humans infected with Taenia solium?
    Eating undercoocked pork-encysted in muscle of meats
  52. Cysticerci
    Juvenile form of Taenia solium
  53. Taenia solium can cause
    Blindness and neurological problems
  54. Pseudocoelomate means?
    False coelom
  55. True coelom (peritoneal cavity) characteristics
    • -Hydrostatic skeleton
    • -Mesentaries (from mesoderm) support for organs and blood supply
    • -Alimentary canal more specialized
    • -Formed in mesoderm during embryonic development
    • -Lined with peritoneum=layer of mesodermal epithelium
  56. False coelom characteristics
    • -First attempt to have fluid-filled body cavity
    • -Derived from blastocoel rather than mesoderm
    • -Space between gut, mesoderm, and ectoderm
  57. Characteristics of pseudocoelomates
    • -Nerve ring or cerebral ganglia connects to posterior and anterior ends
    • -Sexes usually separate (dioecious)
    • -NO circulatory or respiratory systems
  58. Phylum rotifera
    • -Ciliated crowns on their heads called a corona
    • -Found in freashwater environments
    • -Benthic-bottom dwellers
    • -Pelagic-Lives on water sufaces
  59. Nematoda means?
  60. Nematoda characteristics (basics)
    • -12,000 species
    • -Terrestrial, marine, freashwater, parasitic
    • -Agricultural damage
  61. Nematoda physiological characteristics
    • -Cylindrical body
    • -Flexable, nonliving cuticle
    • -NO cilia or flagella
    • -Muscles in body wall run longitudinally only
    • -Excretory system-No protonephridia, canal system or gland cells open to pore
    • -Mave canals or cells or both for excretion
  62. Ascaris lumbricoides
    Human roundworm
  63. Toxocara
    Dog/cat roundworm
  64. Necator americanus
    Human hookworm
  65. Trichinella spiralis
    Trichina worms
  66. Enterobius vermicularis
  67. What does Wuchereia bancrofti cause?
  68. Most common parasite in humans?
    • Pinworms
    • -30% children
    • -16% adults
  69. Representative phyla
    • -Platyhelminthes
    • -Rotifera
    • -Nematoda