ZOO4232 - Lecture 3 Protozoa

ZOO4232 - Lecture 3 Protozoa - Protozoa: Single Celled...

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1 Protozoa : » Single Celled Organisms » Eukaryotic Trematodes, Cestodes - Flatworms Nematodes – Roundworms Arthropods Size : Protozoa range in size from 1 to 150um • The smaller members, 1-10um include most of the intracellular parasites (example: Leishmania , Toxoplasma ) • The largest member is the ciliate Balantidium coli
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2 Phylum Sarcomastigophora ( have flagella, pseudopodia or both). Subphylum Sarcodina (protoplasmic flow without discrete pseudopodia). Examples: Entamoeba , Naegleria Subphylum Mastigophora (trophozoites are motile stage, typically contain 1 to few flagellar). Examples: Leishmania , Giardia , Trichomonas Phylum Ciliophora ( have simple or compound cilia, two types of nuclei). Example: Balantidium Phylum Apicomplexa (have apical complex – micronemes, conoids…). Examples: Plasmodium , Toxoplasma
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3 Plasma Membrane • Eukaryotic • Thin membrane called plasmalemma • Also called pellicle (ciliates) or ectoderm or outer membrane • Microtubules line outer membrane (subpellicular microtubules)
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ZOO4232 - Lecture 3 Protozoa - Protozoa: Single Celled...

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