Platyhelminthes fluke. счастливая случайность


Flukes are found worldwide and range in size from about 0.

platyhelminthes fluke

They most commonly parasitize fish, frogs and turtles, but also humans, domestic platyhelminthes fluke and invertebrates such as mollusks and crustaceans.

They include external parasites ectoparasitesinternal parasites platyhelminthes fluke platyhelminthes fluke semi-external parasites those that attach to the lining of the mouth, to gills, or to the cloaca. Most flukes are flattened and leaflike or ribbonlike and have muscular suckers on the bottom surface, as well as hooks and spines, for attachment to the host.

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Fluke infestations may cause illness e. Flukes occur worldwide and range in size from about 5 millimetres 0.

Flukes are parasites of all classes of vertebrates but most commonly parasitize fish, frogs and platyhelminthes platyhelminthes fluke they also parasitize platyhelminthes fluke, domestic animals and invertebrates such as mollusks and crustaceans. Some are external parasites ectoparasites ; some attach themselves to internal organs endoparasites ; others are semi-external, attaching themselves to the lining of the mouth, to the gills or to the cloaca the end of the digestive tract.

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Some attack a single host, while others require two or more hosts. The symmetrical body of a fluke is covered with a noncellular cuticle. Most are flattened and leaflike or ribbonlike, although some are stout and platyhelminthes fluke in cross section.

Înțelesul "blood fluke" în dicționarul Engleză

Muscular suckers on the ventral bottom surface, hooks and platyhelminthes fluke are used for attachment.

The body is solid and filled with a spongy connective tissue mesenchyme that surrounds all the body organs. A circulatory system is absent.

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The digestive system consists of a simple sac with a mouth either at the anterior end or in the middle of the ventral surface. An anus is usually absent, but some species have one or two anal pores. The nervous system consists of a pair of anterior ganglia or platyhelminthes fluke centres and usually three pairs of lengthwise nerve cords.

Sinonimele și antonimele blood fluke în dicționarul de sinonime Engleză

Platyhelminthes fluke species are hermaphroditic; i. In some, however, the sexes are separate. Most species pass through egg, larval and mature stages. Blood flukes occur in most types of vertebrates; three species attack humans: the urinary blood fluke Schistosoma haematobiumthe intestinal blood fluke S. The human diseases caused by them are known as schistosomiasis bilharziasis ; they affect millions of persons, particularly in Africa and east Asia.

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The urinary blood fluke S. Eggs, laid in the veins, break through the vein wall into the bladder and are voided during urination.

platyhelminthes fluke The larval fluke develops in the body of a snail chiefly of the genera Bulinus and Physopsisthe intermediate host.

The mature larva makes platyhelminthes fluke way into the body of the final host, man, through the skin or the mouth.

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The intestinal blood fluke S. The eggs pass from the host with the feces. The larva enters the body of a snail any of several generathe intermediate host and returns to a human host through the skin.

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Snails of the genus Oncomelania are the intermediate host. The adult occurs in the veins of the small intestine.

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Some eggs are carried in the bloodstream to various organs and may cause a variety of symptoms, including enlargement of the liver. Human hosts may die from severe infestations.

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Flukes of detrimental economic significance to man include the widely occurring giant liver fluke of cattle Fasciola hepatica and the Chinese or Oriental, liver fluke Opisthorchis sinensis or Clonorchis sinensis. Man may become infested with this fluke by eating uncooked vegetables. The Chinese liver fluke infests a platyhelminthes fluke of mammals, including man.

In addition to the platyhelminthes fluke as an intermediate host, the Chinese liver fluke infests fish as a second intermediate platyhelminthes fluke before passing to the final host.

Traducere "flatworm" în română

The cat liver fluke, Opisthorchis felineus, which may also infest man as the final host, also requires a freshwater snail Bithynia leachii and a carp as its secondary intermediate hosts. It was a complete fluke that we just happened to be in the same place at the same time. By some amazing fluke the essay that I was required to tratament natural pentru oxiuri in the exam was one that I'd already done at home.

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Dicţionarul conţine următoarele traduceri în rusă pentru "fluke": Engleză.