Transcript Protozoans - Herscher CUSD #2

Chapter 8
Protozoans
 5 Groups
 Flagellated
 Amoeboid
 Foramanifiera
 Ciliates
 Coccidea
Flagellated
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Have a pellicle (thin membrane) – gives body shape
Free-living
7500 species identified
2 Groups: Phytoflagellated (autotrophic) or Zooflagellated
(heterotrophic)
 Movement:
 Use Flagella
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2-D whiplike/helical movements
Push-pull
 Examples:
 Dinoflagellates (p)
 Euglena (p)
 Trypanosomes (h) – dwell in the tsetse fly gut
Amoeboid
 Diet
 Other protists, bacteria

Eat by phagocytosis
 Particle feeders
 Reproduction
 Asexual - Binary fission once they become a certain size
 Some pathogenic
 Movement:
 Use pseudopodia – temp. cell extensions
 Examples:
 Rhizopodans (naked – no shell/test)
 Entamoeba – causes dysentery in humans (diarrhea…)
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P. 125
Foraminifera
 Marine (Plankton)
 Secrete a calcium carbonate test
 Symmetrical pattern
 Make up much of marine sediments
 White cliffs of Dover, England = Foram Chalk deposit
 Movement:
 Reticulopodia – (branched conveyerbelt –like)
 Examples:
 Heliozoans
 Radiolarians
Ciliates
 Use cilia to generate feeding currents
 Dimorphic nuclei –
 Macronuclei (regulates daily metabolic activites)
 Micronucli (genetic reserve)
 Sexual reproduction
 Movement: cilia
 Examples:
 Paramecium
 Didinium
Coccidea
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All Parasites
Cone structure to penetrate hosts
Reproduction – asexual and sexual
Cause diseases in domestic animals and humans
Movement:
 No cilia or flagella
 Examples:
 Toxoplasma – Mostly asymptomatic, found in cat feces

Pregnant Women - Stillbirths, spontaneous abortions, mental
retardation
 Cryptosporidium
 Plasmodium – causes malaria
 Babesia
Plasmodium: Causes Malaria
 Chills
 Fever
 Rupture of red blood cells
 Release of toxic chemicals