Thesis

PARASITISM IN THE ANIMAL KINGDOM A quick appraise of the puppet kingdom shows that there atomic number 18 bloodsucking members in very much every flying field phylum. Among the Protozoa, many species of amoebae, flagellates, ciliates, and all of the Sporozoa be parasitic. It is of interest to note that despite their small sizes, certain protozoa, much(prenominal) as Stentor and Spirostomum can set as hosts for the flagellate Astasia sp. vitiated amoebae argon known to parasitize opalinid ciliates and Trichodina. The Mesozoa, which be minute, wormlike, acoelomate organisms, include forms that are super acid poriferans in cephalopods and other(a) marine invertebrates. Dicyema, for example, is a common parasite in the nephridia of squids and octopuses. Rhopalura is a little common mesozoan parasite encountered in various tissues and eubstance cavities of marine turbellarians, nemerteans, brittle star, oligochaetes and clams. Although parasitic coelenterates ar e not common, close to are known. One of the virtually democratic subdivisions of Parasitology is parasitic wormology, which deals specifically with the parasitic representatives of the Platyhelminthes, the Nematoda and the Acanthocephala. All Platyhelminthes, except the turbellarians, are parasitic and even a few cases of parasitism have been report among turbellarians.

numerous species of nematodes are parasitic, many as parasites of animal and others as parasites of plants. The phylum Acanthocephala are all parasitic. In addition to these major groups of helminthes, the less commonly encountered Nematomo rpha, or horsehair worm, are of interest to ! helminthologists, because the larvae of most species are parasitic in insects although the adults are free-living in aquatic situations. Some species of the phylum Mollusca, in addition to serving as explicit or as intermediate hosts for protozoan and helminth parasite, may also be ectoparasitic continuously or during some material body of their life cycle. Among the Annelida, the leeches are common ectoparasites on various...If you need to rent a full essay, order it on our website: OrderCustomPaper.com

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