Body Structure. Wikipedia, the free encyclopedia, 2017. Some species of hydra … The attachment occurs through the pedal disc which is a disk-like holdfast. Phylum: Cnidaria bao gồm bốn lớp: Hydrozoa (Hydra, siphonophores), Scyphozoa (Sứa), Cubozoa (thạch hộp) và Anthozoa (hải quỳ, san hô, bút biển).Anthozoa là không cần thiết. Like the difference between a pumpkin and a human head. The key has been arranged to give the same results whether one starts with polyps or medusae. Both are radially symmetrical. If you think about the shape of a pumpkin, there's a top and a bottom, but no left, right, back, or front. Polyp a medusa sú dva typy telesných foriem identifikované v Cnidarians. Cnidarians adalah kumpulan penting dalam kerajaan haiwan dengan banyak ciri unik, dan perubahan generasi cnidarians adalah salah satu ciri mereka. Polyps can reproduce by means of asexual budding, and that indicates their independence on others to sustain their lives. Polyp och medusa är de två typerna av kroppsformer som identifieras i cnidarians. Tentacles are of different types with some are responsible for reproduction; some are for paralyzing the prey animals, and the others are to aid in feeding. Varjupaik: Cnidaria koosneb neljast klassist: Hydrozoa (Hydra, sifonofoorid), Scyphozoa (Meduusid), Kuubooa (karpi želeed) ja Anthozoa (meremetsad, korallid, merekarpid). Sometimes they are colonial, and the colonial medusae have a common pneumatophore, but there are solitary ones, as well. Pennaria Hydrozoa Most species belonging to the class of aquatic creatures known as hydrozoans may exist in either a medusa or polyp state. Corals, sea anemones and jellyfish belong to a group of animals called cnidarians. • Medusa is a free-swimming stage while polyp is a sessile form. Peamised erinevused - Polyp vs Medusa. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Existuje mnoho rozdílů mezi medusae a polypy, pokud jde o tvary, velikosti a funkce. The solitary polyps are attached to the ground by a holdfast called the pedal disc. The mesoglea of the polyps is not much thick, but it is present between the single cell-layered ectoderm and endoderm. As nouns the difference between polyp and medusa is that polyp is (medicine) an abnormal growth protruding from a mucous membrane while medusa is (zoology) a non-polyp form of individual cnidarians, consisting of a gelatinous umbrella-shaped bell and trailing tentacles. Terms of Use and Privacy Policy: Legal. yp / ˈpäləp / • n. 1. Scyphozoa and Cubozoa are free-swimming whereas Hydrozoa can be found in either freshwater or marine habitats. Some animals possess both types of body forms. A medusa produces eggs or sperm, which are usually shed into the water; when an egg is fertilized, it develops into a swimming larva, which eventually settles and grows into a polyp. In contrast, medusa are a more evolved form of cnidarians, being mobile, reproducing sexually which promotes genetic diversity, and presenting photoreceptors and statocytes as sense organs. Polyps and Medusae are the names of two body forms. Huvudskillnad - Polyp vs Medusa. • Medusa is the reproductive stage and polyp is the asexual stage of Hydrozoans. One stage of Cubozoans’s life cycle also occurs in the medusa form. Medusa is the adult and sexual form whereas Polyp is juvenile and asexual form. Polyp: Polyp is a sessile organism. Kmen Cnidaria zahrnuje druhy existující pouze ve stádiu polyp (Anthozoa), druhy existující ve stádiu medúzy a druhy s oběma stupni životního cyklu (Hydrozoa). Medusa: Gastrvascular cavity is the stomach and it consist of four radial canals and one circular canal. The middle bits are all the same. Fylum: Cnidaria sa skladá zo štyroch tried: Hydrozoa (Hydra, siphonophores), Scyphozoa (Medúza), Cubozoa (Box želé) a Anthozoa (sasanky, koraly, morské perá). polyp and medusa, names for the two body forms, one nonmotile and one typically free swimming, found in the aquatic invertebrate phylum Cnidaria (the coelenterates). Medusa: Body is saucer-shaped, umbrella-like structure containing a reduced stalk. Polyps have their mouth and the tentacles located at the oral end of their body, which is directed upwards always. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Accessed 24 Feb 2017 2. Each polyp is connected to the other polyps in the colony either directly or indirectly. , viz., polyp and medusa as two stages of their life cycle also occurs in the column!, dimensiunile și funcțiile freshwater or marine habitats or egg-shaped as in Portuguese Man-of-War the. 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