Chapter 17 Slide

Chapter 17 Slide - BIO 205 Chapter 17 Parasites...

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Unformatted text preview: BIO 205 Chapter 17 Parasites Classification and Characteristics of Protists Some dinoflagellates cause red tides Green algae have chloroplasts and perform photosynthesis Many are free-living, thriving in environments with water Most are unicellular The Protists Are a Perplexing Group of Microorganisms: Protists Trichonympha Giardia intestinalis Trypanosoma Apicomplexans include parasites such as Plasmodium and Toxoplasmosis Kinetoplastids include trypanosomes causing sleeping sickness and Leishmania Diplomonads, including Giardia intestinatlis , have bilateral symmetry Some parabasalids live mutualistically in termite guts The Protozoa Encompass a Variety of Lifestyles Amoeba proteus Pseudopods also form food vacuoles for ingestion Amoebozoans are mostly free-living Amoeboid motion occurs by the formation of pseudopods Paramecium Ciliates have two types of nuclei: Contractile vacuoles eliminate excess water The pellicle provides cell structure and stores calcium ions Ciliates are covered with rows of hair-like cilia micronuclei macronuclei Sexual Recombination in a Ciliate The asexual cycle occurs in the intermediate host The sexual cycle occurs in the definitive host The infective form of some protozoa is a trophozoite, others a cyst Parasite Life Cycles Have Some Unique Features Protozoal Diseases of the Skin, and the Digestive and Urinary Tracts...
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Chapter 17 Slide - BIO 205 Chapter 17 Parasites...

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