Contents 1 Morphology 2 Defense mechanism 3 Gallery 4 See also 5 References


Morphology[edit] Adult: cylindrical shape, creamy white or pinkish in color Male: average 15–30 cm and is more slender than female Female: average 20–35 cm in length The body is long, cylindrical, fusiform (pointed at both the ends), body wall is composed of cuticle, epidermis and musculature. Presence of a false body pseudocoelom not lined by epithelium. Digestive system is complete. Respiration by simple diffusion. Nervous system consists of a nerve ring and many longitudinal nerve cords. Only sexual reproduction. Sexes are separate with sexual dimorphism. Males are usually shorter than females.[citation needed]


Defense mechanism[edit] As part of the parasite defense strategy, Ascaris roundworms secrete a series of inhibitors to target digestive and immune-related host proteases, which include pepsin, trypsin, chymotrypsin/elastase, cathepsins, and metallocarboxypeptidases (MCPs). Ascaris species inhibit MCPs by releasing an enzyme known as Ascaris carboxypeptidase inhibitor (ACI). This enzyme binds to the active site of MCP and blocks the cleavage of its own proteins by the host MCP.[6]


Gallery[edit] Esophagus of an Ascaris worm Ascaris cross section 40× Ascaris cross section 40× Ascaris cross section 400×


See also[edit] List of parasites (human)


References[edit] ^ Carter, Burton J. Bogitsh, Clint E. (2013). Human parasitology, Chapter 16: Intestinal nematodes (4th ed.). Amsterdam: Academic Press. p. 291. ISBN 978-0-12-415915-0. Retrieved 19 November 2015.  ^ "Parasites:Ascarids". eXtension. September 27, 2011. Retrieved 9 November 2014.  ^ "Parasites-Ascariasis". Centers for Disease Control and Prevention. Retrieved 30 May 2013.  ^ Hall, A., G. Hewitt, V. Tuffrey and N. de Silva (2008). A review and meta-analysis of the impact of intestinal worms on child growth and nutrition. Maternal and Child Nutrition, 4 (Suppl 1): 118-236 ^ Jardim-Botelho, A; Raff, S; Rodrigues Rde, A; Hoffman, HJ; Diemert, DJ; Corrêa-Oliveira, R; Bethony, JM; Gazzinelli, MF. "Hookworm, Ascaris lumbricoides infection and polyparasitism associated with poor cognitive performance in Brazilian schoolchildren". tropical medicine and international health. 13: 994–1004. doi:10.1111/j.1365-3156.2008.02103.x. PMID 18627581.  ^ Sanglas, Laura; Aviles, Francesc X.; Huber, Robert; Gomis-Ruth, F. Xavior; Arolas, Joan L. 2008. Mammalian metallopeptidase inhibition at the defense barrier of Ascaris parasite. University of Barcelona, Spain. Retrieved from "https://en.wikipedia.org/w/index.php?title=Ascaris&oldid=813674450" Categories: AscarididaParasites of equinesHidden categories: Articles with 'species' microformatsAll articles with unsourced statementsArticles with unsourced statements from November 2015


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Ascaris - Photos and All Basic Informations

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AscariasisTaxonomy (biology)EAnimalNematodeChromadoreaAscarididaAscarididaeCarl Linnaeus10th Edition Of Systema NaturaeAscaris LumbricoidesAscaris SuumEnlargeParasiteNematodeHelminthsAscaris LumbricoidesAscariasisAscaris SuumPigsParascaris EquorumHelminthCuticlePseudocoelomCellular RespirationNerve RingSexual DimorphismWikipedia:Citation NeededProteasesPepsinTrypsinChymotrypsinElastaseCathepsinMetallocarboxypeptidaseEdit Section: See AlsoList Of Parasites (human)International Standard Book NumberSpecial:BookSources/978-0-12-415915-0Digital Object IdentifierPubMed IdentifierHelp:CategoryCategory:AscarididaCategory:Parasites Of EquinesCategory:Articles With 'species' MicroformatsCategory:All Articles With Unsourced StatementsCategory:Articles With Unsourced Statements From November 2015Discussion About Edits From This IP Address [n]A List Of Edits Made From This IP Address [y]View The Content Page [c]Discussion About The Content Page [t]Edit This Page [e]Visit The Main Page [z]Guides To Browsing WikipediaFeatured Content – The Best Of WikipediaFind Background Information On Current EventsLoad A Random Article [x]Guidance On How To Use And Edit WikipediaFind Out About WikipediaAbout The Project, What You Can Do, Where To Find ThingsA List Of Recent Changes In The Wiki [r]List Of All English Wikipedia Pages Containing Links To This Page [j]Recent Changes In Pages Linked From This Page [k]Upload Files [u]A List Of All Special Pages [q]Wikipedia:AboutWikipedia:General Disclaimer



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