fluke meaning in biology

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The boats were here hailed, to tow the whale on the larboard side, where, While the two headsmen were engaged in making fast cords to his, Your - shall we say capture, was by way of being a gigantic, "Then," said Raffles, "it was the kind of, He still thinks I 'm a rube, an' that it was a, but an anchor on a man’s shoulder; and here’s the other, An anchor is forged and fashioned for faithfulness; give it ground that it can bite, and it will hold till the cable parts, and then, whatever may afterwards befall its ship, that anchor is "lost." The species belongs to the family Paralichthyidae of class Actinopterygii, phylum Chordata. They occur worldwide and range in size from about 5 millimetres (0.2 inch) to several centimetres; most do not exceed 100 millimetres (4 inches) in length. The honest, rough piece of iron, so simple in appearance, has more parts than the human body has limbs: the ring, the stock, the crown, the, "'O the blazing tropic night, when the wake's a welt of light That holds the hot sky tame, And the steady forefoot snores through the planet-powdered floors Where the scared whale, But come, it's getting dreadful late, you had better be turning, M2 EQUITYBITES-July 22, 2019-Test and Measurement Specialist. noun. The Oriental blood fluke, which occurs primarily in China, Japan, Taiwan, the East Indies, and the Philippine Islands, differs from S. mansoni and S. haematobium in that it may attack vertebrates other than man, including various domestic animals, rats, and mice. ‘Contrary to what Bettman might think, a fluke occurrence can not be used as precedent: after all, a fluke occurrence is by definition rare.’. A circulatory system is absent. The flukes (Trematoda) are a class of parasitic worms belonging to the phylum Platyhelminthes. ‘We would say, in fact, that B's failure to castle was a fluke, bad luck with the random number generator.’. Fluke, also called blood fluke or trematode, any member of the invertebrate class Trematoda (phylum Platyhelminthes), a group of parasitic flatworms that probably evolved from free-living forms millions of years ago. The adult occurs in the veins of the small intestine. In particular, the fluke pertains to either of the two lobes of the tail of whales and dolphins. This taxonomic class of phylum Platyhelminthes (flatworms) is characterized by having external suckers that they use to anchor themselves within their host. Plant organs are comprised of tissues working together for a common function. Most species are hermaphroditic; i.e., functional reproductive organs of both sexes occur in the same individual. An unlikely chance occurrence, especially a surprising piece of luck. Views expressed here do not necessarily reflect those of Biology Online, its staff, or its partners. The section is split into geological periods in the.. Are Successful People Really Luckier? Any of various flatfishes chiefly of the genus Paralichthys, especially the summer flounder. Find out more about its unique features and why they matte.. Multicellular organisms evolved. All Rights Reserved, The Evolutionary Development of Multicellular Organisms. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Know the different stag.. Meet the colorful takahē, an extremely rare flightless bird. These flounders are typically found in the Atlantic Ocean. Let us know if you have suggestions to improve this article (requires login). Flukes are parasitic and some, such as Chlonorchis sinensis, the liver fluke, parasitize humans causing disease. Updates? Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. fluke 1. In some, however, the sexes are separate. Most are flattened and leaflike or ribbonlike, although some are stout and circular in cross section. Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Expert to give advice on tackling fluke; MONITOR FARM, Test and Measurement Specialist Fluke Acquires Germany Based Pruftechnik, Fluids Engineering Division Summer Meeting. Before using our website, please read our Privacy Policy. It also covers population genetics, particularly gen.. There are more than 10,000 species of flukes. The nervous system consists of a pair of anterior ganglia, or nerve centres, and usually three pairs of lengthwise nerve cords. The intestinal blood fluke (S. mansoni), which lives in the veins around the large and small intestines, occurs primarily in Africa and in northern South America. Our editors will review what you’ve submitted and determine whether to revise the article. The flukes are used for propulsion. This tutorial digs into the past to investigate the origins of life. The eggs pass from the host with the feces. Black Friday Sale! The urinary blood fluke (S. haematobium), which lives in the veins of the urinary bladder, occurs mainly in Africa, southern Europe, and the Middle East. Definition noun, plural: flukes (1) (ichthyology) Summer flounder, Paralichthys dentatus (a flatfish) (2) (cetology) Either of the two lobes of the tail of a cetacean, e.g. [1855–60; of obscure orig. It is not intended to provide medical, legal, or any other professional advice. Paragonimus westermani, Fasciola hepatica, and Clonorchis sinensis, are those that are found in lungs, bile ducts, and other tissues of their hosts. either half of the triangular tail of a whale. 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. Premium Membership is now 50% off! Eggs, laid in the veins, break through the vein wall into the bladder and are voided during urination. Any information here should not be considered absolutely correct, complete, and up-to-date. This article was most recently revised and updated by, https://www.britannica.com/animal/fluke-flatworm, CALS Encyclopedia of Arkansas - Trematodes. The digestive system consists of a simple sac with a mouth either at the anterior end or in the middle of the ventral surface. One species, Leucochloridium macrostomum,... Save 50% off a Britannica Premium subscription and gain access to exclusive content. Blood flukes occur in most types of vertebrates; three species attack humans: the urinary blood fluke (Schistosoma haematobium), the intestinal blood fluke (S. mansoni), and the Oriental blood fluke (S. japonicum). Either of the two flattened fins of a whale's tail. Flukes parasitize members of all vertebrate classes but most commonly parasitize fish, frogs, and turtles; they also parasitize humans, domestic animals, and invertebrates such as mollusks and crustaceans. In parasitology, a fluke is a common name given to parasitic flatworms of the class Trematoda (trematodes).

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