what are the tissues of cnidarians
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- Another aspect of cnidarians is that all cnidarians have two layers of living tissue. These two layers are always separated by a gelatinous layer called mesoglea. The first layer of living tissue is known as the dermis, and the second layer is know as the gastordermis.
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- The Cnidarians are a diverse group of organisms characterized by the presence of true tissues, radial symmetry, presence of a gastrovascular (digestive) cavity and specialized stinging cells called cnidocytes. They are almost exclusively marine. Cnidarians may occur in one of two body forms.
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Cnidarians Box Jellyfish. Phylum Cnidaria. Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra.Although Cnidaria is an incredibly diverse group of animals, there are several traits that link them together.ome cnidarians, such as true coral and sea anemones, live their entire lives in the polyp stage and do not metamorphose into the second form, which is known as the medusa. In true jellyfish and in box jellyfish, the medusa is the most prominent form.
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- The characteristics of cnidarians are that they have claws, hard exoskeleton, and reproduce sexually. ----- That answer is just silly. The phylum, cnidaria, includes hydras, jellyfish, sea anemones, and corals.
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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.
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- Cnidaria 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.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 take on two basic 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. The mesoglea layer of the medusa body wall is thick and jelly-like.
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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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- There are about 10, 000 species of Cnidarians. Cnidaria have no organs like hearts or lungs. They have an internal cavity used for respiration and a gastrovascular cavity (a stomach) with a mouth but they do not have an anus.
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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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- 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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- Internal Transport. Cnidarians do not have any defined circulatory system that is to sat that there is no organized internal transport. Instead most cnidarians have a long gastrovascular cavities that help carry partially digested food throughout there body. The do not have any blood.
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sponges & cnidarian notes b1 Characteristics. 1  Includes marine organisms such as jelllyfish, Portuguese man-of-war, coral, sea anemone, & sea fans. 2  Hydra is a freshwater cnidarian. 3  All carnivorous.  Have 2 cell layers (epidermis -outer & gastrodermis-inner) with a hollow body called gastrovascular cavity.
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Introduction to Cnidaria Jellyfish, corals, and other stingers. Cnidarians are incredibly diverse in form, as evidenced by colonial siphonophores, massive medusae and corals, feathery hydroids, and box jellies with complex eyes.Yet, these diverse animals are all armed with stinging cells called nematocysts.Cnidarians are united based on the presumption that their nematocysts have been inherited from a single common ancestor. The name Cnidaria comes from the Greek word cnidos, which means stinging nettle.et, these diverse animals are all armed with stinging cells called nematocysts. Cnidarians are united based on the presumption that their nematocysts have been inherited from a single common ancestor. The name Cnidaria comes from the Greek word cnidos, which means stinging nettle.
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- Two main body plans can be found in the Cnidarians: polyps, with the tentacles and mouth on top, and usually a column-shaped sessile body, and medusae, with the tentacles and mouth underneath, and usually a bell-shaped body that can pulse and swim - a jellyfish.
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Cnidarians Morphologically, cnidarians are classified as polyps or medusae. Polyps are cylindrical and medusae are circular convex, like an umbrella. Both shapes have tentacles. In general, polyps are sessile although some species, such as Hydra, can move by alternating contact points on the substrate and performing somersaults. Medusae can move expelling water jets through contracting their bodies. Some cnidarians alternate between polypoid and medusoid forms during their life cycle.
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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.here 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 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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- cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organ … ized into tissues. the inner layer forms a digestive cavity where food is broken down. A jelly fish.es, many species of cnidarians have powerful stinging cells and potent venom strong enough to cause injury and or death to humans. These include the Portuguese man of war, th … e sea wasp, lion's mane jellyfish, fire coral, and the carpet sea anemone.
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Cnidaria Most 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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Cnidarians Box Jellyfish. Phylum Cnidaria. Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra.Although Cnidaria is an incredibly diverse group of animals, there are several traits that link them together.ox Jellyfish. Phylum Cnidaria. Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra.
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Characteristics of cnidarians? Some cnidarians are exclusively sessile (attached to a substrate), exclusively free swimming, or include both forms during their life cycle. The characteristics of cnidarians are that they have claws, hard exoskeleton, and reproduce sexually. -------. That answer is just silly.
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- Structure [edit]. Nervous tissue is composed of neurons, also called nerve cells, and neuroglial cells. Typically, nervous tissue is categorized into four types of tissue. In the central nervous system (CNS), the tissue types found are grey matter and white matter.In the peripheral nervous system (PNS), the tissue types are nerves and ganglia.ypically, nervous tissue is categorized into four types of tissue. In the central nervous system (CNS), the tissue types found are grey matter and white matter. In the peripheral nervous system (PNS), the tissue types are nerves and ganglia.
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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 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.
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cnidarian any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate. adjective. 2. belonging or pertaining to the Cnidaria.
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Cnidaria Cnidaria (/naɪˈdɛəriə/) is a phylum containing over 10,000 species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey.