name and describe the two body forms of cnidarians
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- All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae. When you look at them, you can see that these body forms are the same except that one is upside down.
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What are cnidarians characteristics? There are two types (or body plans) of cnidarians. There is the Medusa, which is a Jellyfish, really. And there is a Polyp, which is like an upside-down Jellyfish, if you want it simply.A polyp would be your sea anemone or coral.They spend most of their lives attached to a hard surface underwater. All Cnidarians are aquatic and carnivorous, and they occur in two basic body shapes: polyps,…. 2  Characteristics of Cnidaria Cnidaria is an alternative name for the invertebrate phylum Coelenterata, giving emphasis to the stinging structures as characteristic of the phylum.
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Cnidaria: More on Morphology Cnidarians are said to be the simplest organisms at the tissue grade of organization. Their cells are organized into true tissues. Cnidarians are essentially bags made of two cell layers. The outer layer, or epidermis, contains the cnidocysts, the stinging cells that are characteristic of the phylum.nidarians are said to be the simplest organisms at the tissue grade of organization. Their cells are organized into true tissues. Cnidarians are essentially bags made of two cell layers. The outer layer, or epidermis, contains the cnidocysts, the stinging cells that are characteristic of the phylum.
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- 3rd (they). have do. had did. There is a type of auxiliary verb called a modal which changes the meaning of a verb in different ways. Words like can, should, would, may, might, and must are modals and are covered in other lessons. There are other lessons that cover the use of verbs.
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Difference Between Sponges and Cnidarians There are about 10,000 species found in this phylum. The key characteristic features of cnidarians include radial symmetry, acoelomate body with tissues, lack of organs, and the simple digestive sac that opens through a mouth, which is surrounded by tentacles armed with nematocysts.All cnidarians are carnivores and have very simple body structures adapted as predators.he key characteristic features of cnidarians include radial symmetry, acoelomate body with tissues, lack of organs, and the simple digestive sac that opens through a mouth, which is surrounded by tentacles armed with nematocysts.
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Cnidarians There are many advantages for the Cnidarians having two stages in their life cycle. One is in their Polyp Form, one of the stages; they can grow from their juvenile stage easily like the Porifera's do. Another advantage comes from their second stage called the Medusas Stage. During this stage, the Cnidarians can move around in the water there-by allowing the Cnidarians to seek out different types of food.
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- Polyp – usually attached to an object and tubelike, Have a fringe of tentacles surrounding the mouth (located on the free end of the organism) Cnidarians have two layers of cells (arise from the ectoderm and endoderm) and are filled with middle layer of mesoglea.
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Cnidaria The Cnidaria phylum mostly consists of different types of corals,jellyfish and sea anemones. Cnidarians reproduce both sexually and asexually. Many species in the Cnidarian phylum have complex life cycles with asexual polyp stages and sexual medusae, but some omit either the polyp or the medusa stage.
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- Cnidaria is one of the more primitive animal phyla. It includes aquatic organisms such as jellyfish, sea anemones, corals, and hydras. Most cnidarians are marine, although a few, such as the well-known hydra, are freshwater species.nidaria A phylum that comprises the sea anemones, jellyfish, and corals, and which is known from the late Precambrian. Cnidarians are basically radially symmetrical and have tentacles. The body contains a gastrovascular cavity and the body wall is diploblastic.
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A Guide to the Cnidarians Cnidarians exhibit two basic structural forms, a medusa and a polyp. The medusa form is a free-swimming structure which consists of an umbrella-shaped body (called a bell), a fringe of tentacles that hang from the edge of the bell, a mouth opening located on the underside of the bell, and a gastrovascular cavity.nidarians are radially symmetrical and they have tentacles that encircle their mouth. The body wall of cnidarians consists of an outer layer or epidermis, an inner layer or gastrodermis, and a middle layer or mesoglea. Cnidarians lack organs and posses a primitive nervous system known as a neural net.
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- All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae.
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- Cells have become specialized and form true tissues and cnidarians are the first group to have B nerve cells organized into a nerve net B sense organs (statocysts and ocelli) B extracellular digestion Cnidarian Body Plan The diploblastic cnidarians are radially or biradially symmetrical with oral and aboral ends.
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Definitions &Translations They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single orifice and body cavity that are used for digestion and respiration.
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What makes a cnidarian unique? The presence of only two tissues layers makes cnidarians  diploblastic. These tissues layers consist of an epidermis (outer  layer) and a gastrodermis (inner gut layer).
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Fascinating Facts About Cnidarians There are two types, called polypoid and medusoid. Polypoid cnidarians have tentacles and a mouth that face up (think of an anemone or coral). These animals are attached to a substrate or colony of other animals. Medusoid types are those like jellyfish-the body is on top and tentacles and mouth hang down.
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General Biology/Print version Cnidaria. Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments. All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa.Sea anemones and corals have the polyp form, while jellyfish are typical medusae.When you look at them, you can see that these body forms are the same except that one is upside down.ll cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae. When you look at them, you can see that these body forms are the same except that one is upside down.
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Cnidarians: Types & Examples Cnidarians are invertebrate animals (meaning they have no backbone, like insects, worms and sponges) which live mainly in the ocean at a wide range of depths and temperatures. Their name comes from the Greek word for stinging nettles, 'cnidos', because they have thousands of stinger cells on their tentacles.
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- This term is now often applied to both the Cnidaria and the Ctenophora together, based on the fact that species belonging to these two phyla have radial or biradial symmetry. Some of the other common characteristics of the Cnidaria phylum include: 1.All species belonging to this phylum have bodies that have radial symmetry. This means that they are the same shape from every side and that the whole jellyfish body is around a central axis. 2.ne of the more interesting characteristics of the species of this phylum is the fact that they exist in two different body forms. They are a polyp or a medusa at different times in their life cycle. The reproductive cycle of the members of this phylum is also distinctive.
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- Cnidarians are characterized by the presence of three tissue layers, an outer protective epidermis, a middle layer called the mesoglea, and an inner layer called the gastrodermis, whose function is primarily digestive.nidaria A phylum that comprises the sea anemones, jellyfish, and corals, and which is known from the late Precambrian. Cnidarians are basically radially symmetrical and have tentacles.
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cniadarian notes 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). Some animals of this group are always polyps, some are always medusae, and some exhibit both a polyp and a medusa stage in their life cycle. The polyp is a sessile, or nonmotile, organism; well-known solitary polyps are the sea anemone and the freshwater hydra.
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- Cnidarians include jellyfish and corals. Cnidarians are less  complex than annelids or mollusks because the latter have gills  with many layers of tissue.cientists also believe they have a common ancestor because both phylla contain species w … hich produce free-swimming Trochophore Larvae (most molluscs except Cephalopods, and Class Polychaeta in Annelids). 2 people found this useful.
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Flatworm Like other bilaterians, they have three main cell layers (endoderm, mesoderm, and ectoderm), while the radially symmetrical cnidarians and ctenophores (comb jellies) have only two cell layers. Beyond that, they are defined more by what they do not have than by any particular series of specializations..
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- Of the few fresh-water types of Cnidarians, the hydra is probably the best-known. Hydras, which can migrate up streams to move into new lakes, do not have a medusa form, which makes sense in a stream environment. A few Cnidarians found in large, old lake systems may still have medusa stages.
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Cnidaria Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids, or both. Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors.Several free-swimming Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes.ost cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from endosymbiotic algae, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish and turtles.
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- The characteristic that gives cnidarians their name is: cnidarian means nettle and nettles are plants that release stinging barbs into the skin. All cnidarians have stinging … cell's. Cnidarians have complex tissues, a gut for digesting food, and a nervous system.
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- No, cnidarians are not protostomes or deuterostomes. They fall under (the unranked taxonomic level) Radiata, while both superphylum Deuterostomia and Protostomia are under th … e (unranked taxonomic level) Bilateria.Features of Bilateria include bilateral symmetry (at some point) and three distinctive germ layers, while Radiata only has two.+ 2 others found this useful.es, a protostome is, and so is a deuterostome. Neither are diploblastic. This is mainly because of the developement of the coelem or body cavity. Just remember, both protosom … e and deuterostome require a three germ layer (that is a triploblastic cell) - ALWAYS.