helminths

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Author:
lintyone
ID:
173180
Filename:
helminths
Updated:
2012-09-25 00:09:09
Tags:
ibhs microbes
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Description:
IBHS exam 2 - helminths
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  1. helminths
    • eukaryotic
    • linear DNA
    • lacks cell wall
    • multicellular
    • may be motile
  2. 2 types of helminths
    • platyhelminthes
    • nemathelminthes
  3. platyhelminthes
    flatworms

    • adults have flattened body
    • head
    • bilateral symmetry
    • organ systems
    • - nervous & reproductive (hermaphroditic)
  4. types of platyhelminthes
    • cestoda (segmented - tapeworms)
    • trematoda (non-segmented - flukes)
  5. nemathelminthes
    roundworms

    • - adults have cylindrically shaped bodies
    • - tapered on both ends
    • - bilateral symmetry
    • - organ sys
    •     --> digestive (w/mouth & anus), reproductive (male & female), primitive nervous sys
  6. cestoda
    • (platyhelminthes)
    • >segmented 
    • >tapeworms

    • - no digestive sys
    • - larvae & cyst infect "animal" tissue
    • - adults infect human intestines 
  7. trematoda
    • (playthelminthes)
    • >non-segmented
    • >flukes

    • - digestive sys: common mouth & anus
    • - larvae infect aquatic animals & plants
    • (snail, clam, fish, crab, aquatic plants)
    • - adults infect humans (liver, lungs, BVs)
  8. types of namethelminthes
    • whipworms  (ingested or pass thru skin --> liver)
    • trichina worms
    • hookworms
    • pinworms (common in kids; in L intestine & perianal area)
    • filarids
    • ascarids (can affect lungs --> fever & cough)

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