Webplatyhelminth: [ flat´werm ] an individual organism of the phylum platyhelminthes ; those parasitic in humans include tapeworms and flukes . Called also platyhelminth . WebPlatyhelminth. In addition, most platyhelminths possess a formalized excretory system consisting of two (rarely one or three) sets of protonephridia, which may be connected at several points throughout the body or may join at a common excretory vesicle. From: Encyclopedia of Biodiversity (Second Edition), 2013.

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WebPlatyhelminth definition, any worm of the phylum Platyhelminthes; a flatworm. See more. WebJun 8, 2024 · Phylum Platyhelminthes is composed of the flatworms: acoelomate organisms that include many free-living and parasitic forms. Most of the flatworms are … fifa education

28.3B: Phylum Platyhelminthes - Biology LibreTexts

WebPlatyhelminth. Heterocellular platyhelminths usually conduct these functions in separate organs, possessing an ovary (or occasionally several ovaries) that produces ova and a … The oldest known free-living platyhelminth specimen is a fossil preserved in Eocene age Baltic amber and placed in the monotypic species Micropalaeosoma balticus, whilst the oldest subfossil specimens are schistosome eggs discovered in ancient Egyptian mummies. See more The flatworms, flat worms, Platyhelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian See more Distinguishing features Platyhelminthes are bilaterally symmetrical animals: their left and right sides are mirror images of each other; this also implies they have distinct top and bottom surfaces and distinct head and tail ends. Like other bilaterians, … See more An outline of the origins of the parasitic life style has been proposed; epithelial feeding monopisthocotyleans on fish hosts are basal in the Neodermata and were the first shift to parasitism from free living ancestors. The next evolutionary step was a dietary change from See more • Miracidium • Regenerative medicine • Schistosoma See more Early classification divided the flatworms in four groups: Turbellaria, Trematoda, Monogenea and Cestoda. This classification had … See more The relationships of Platyhelminthes to other Bilateria are shown in the phylogenetic tree: The internal relationships of Platyhelminthes are shown below. The tree is not fully resolved. The oldest … See more Parasitism Cestodes (tapeworms) and digeneans (flukes) cause diseases in humans and their livestock, whilst monogeneans can cause serious … See more WebIntroduction to the Platyhelminthes Life in two dimensions. . . The simplest animals that are bilaterally symmetrical and triploblastic (composed of three fundamental cell layers) are the Platyhelminthes, the flatworms. … fifa editor tool suite