Where is food digested in a cnidarian?
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cnidarians have a sac called a gastovascular cavity where digestion occurs. There's only one opening to it that acts as both a mouth and anus.
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im studying the digestive system right now, so i'll have a go at this question (u may want to chec accuracy).\nthe cell gets the carbon it needs via the blood supply. when we eat, all the nutrients are broken down and molecules such as hydrogen, oxygen and carbon are filtered into the blood stream so that they can be passed on to all the cells in th body.\n\ndoes that help?
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digested food that has been through the digestive system and it is really digested chyme
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Cnidarians employ these stinging cnidocysts to immobilize, kill, or entangle their prey.
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They vary as widely as the body plans of different mollusks, but basically there are both macrophagous (herbivores and predators) and microphagous (suspension feeders) forms.\n \n**Gasteropods (snails and slugs) are mainly herbivorous; they use their radula to scratch plant tissues. However, there are also predatory snails (with modified radula, or proboscis, or even a venom-injecting radula). There are also microphagous planktonic forms (pteropods).\n**Cephalopods (squids, octopi and their relatives) are predatory carnivores, they have a modified radula and a horny "beak" with which they eat different invertebrates and vertebrates.\n**Bivalves (clams, mussels, oysters, etc) are primarily microphagous or suspension (filter) feeders. They don't have a radula and rely on their modified gills for filtration. There are also some primitive detritivores among the bivalvians.\n**The chitons (Polyplacophora) are grazing herbivores (with  radula).\n**The Scaphopoda (tusk shells) capture small food items (particulate matter) with their tentacles (captacula).\n**Other less known mollusks include the caudofoveatans (these capture foraminiferans and other very small organisms from sediments), solenogasters (these eat corals) and monoplacophorans (with a radula, but not much is known about their ecology).
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1. The frog has feeble, practically useless teeth unlike humans who use their teeth for mastication in digestion.\n\n2. Solid wastes from the frog's large intestine pass into the cloaca where both liquid and solid waste material leave the body by way of the cloaca and the cloacal vent.In humans liquid waste leave the body by way of the urethra. while solid waste leaves the body by way of the rectum through the a nus.
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You really should at least try do your own homework. I won't do it for you, but if you can find out what phyla the following animals are in you will have the answer.\n\n1) Cow \n2) Lobster \n3) Squid \n4) Jellyfish (yes people eat jellyfish see first link below)\n5) Earthworms (see second link below, search for "Makiritare ) \n6) Beche de Mer\n7) Lamp shell (see link 3 below).\n8) Sipunculids (see link 4)
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The small intestine is where the most chemical digestion takes place; peptides are degraded into amino acids; lipids (fats) are degraded into fatty acids and glycerol; and carbohydrates are degraded into simple sugars (e.g., glucose).
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The exact same way it does a carrot, cookie, cheese... and everything else you eat.\n\n\n\nIn humans, digestion begins in the mouth where food is chewed with the teeth. The process stimulates exocrine glands in the mouth to release digestive enzymes such as salivary amylase, which aid in the breakdown of food, particularly carbohydrates. Chewing also causes the release of saliva, which helps condense food into a bolus that can be easily passed through the esophagus. The esophagus is about 20 centimeters long. The food is pushed down by a movement called peristalsis, which is the wave-like contraction of smooth muscle tissue characteristic of the Digestive system.\n\nThe food then goes to the stomach when it passes through the cardiac sphincter. In the stomach, food is churned and thoroughly mixed with hydrochloric acid and other digestive enzymes with digestive fluid to further decompose it chemically for a few hours. As the acidic level changes in the stomach and later parts of the digestive tract, more enzymes are activated or deactivated to extract and process various nutrients.\n\nAfter being processed in the stomach, food is passed to the small intestine via peristalsis. It passes through the pyloric sphincter and enters the first 10 inches of the small intestine, the duodenum, where it is further mixed with 3 different liquids, which are bile (which helps aid in fat digestion), pancreatic juice (made by the pancreas), and intestinal juice. They also add several enzymes: maltase, lactase and sucrase, to process sugars. (Bile also contains pigments that are by-products of red blood cell destruction in the liver; these bile pigments are eliminated from the body with the feces.) Most nutrient absorption takes place in the small intestine. The nutrients goes through the small intestine's wall (small, finger-like structure, that is called villi). The blood, which has absorbed nutrients, is carried away from the small intestine via the hepatic portal vein and goes to the liver for filtering, removal of toxins and help processing of nutrients.\n\nAfter going through the small intestine, the food then goes to the large intestine. The large intestine has 3 parts: the cecum (or pouch that forms the T-junction with the small intestine), the colon, and the rectum. In the large intestine, water is reabsorbed, and the foods that cannot go thorugh the villi such as fiber, can be stored in large intestine. Fiber helps to keep the food moving through the G.I. tract. The food that cannot be broken down is called feces. Feces is stored in the rectum until it is expelled through the anus
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Jellyfish are marine invertebrates belonging to the Scyphozoan class, and in turn the phylum Cnidaria. The body of an adult jellyfish is composed of a bell-shaped, jellylike substance enclosing its internal structure, from which the creature's tentacles suspend. Each tentacle is covered with stinging cells (cnidocytes) that can sting or kill other animals: most jellyfish use them to secure prey or as a defense mechanism. Others, such as Rhizostomae, do not have tentacles at all. To compensate for its lack of basic sensory organs and a brain, the jellyfish exploits its nervous system and rhopalia to perceive stimuli, such as light or odor, and orchestrate expedient responses. In its adult form, it is composed of 94–98% water and can be found in every ocean in the world.\n\nMost jellyfish are passive drifters that feed on small fish and zooplankton that become caught in their tentacles. Jellyfish have an incomplete digestive system, meaning that the same orifice is used for both food intake and waste expulsion. They are made up of a layer of epidermis, gastrodermis, and a thick jellylike layer called mesoglea that separates the epidermis from the gastrodermis.\n\nTheir shape is not hydrodynamic, which makes them slow swimmers. But speed and low water resistance are not important as they are drifters that feed on plankton. It is more important for them that their movements create a current where the water (which contains their food) is being forced within reach of their tentacles. They accomplish this by having a body shaped like a bell which is rhythmically opened and closed.
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Saliva; salivary glands; mastication; tongue; chyme; bolus; esophagus; peristalsis; smooth muscle; epiglottis; cardiac sphincter; stomach; fundus; hydrochloric acid; pepsin; pyloric sphincter; duodenum; bile; gall bladder; bile duct; pancreas; amylase; jejunum; absorption; mesentary; ileum; colon; apendix, cecum, rectum, anus.
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jellyfish 'breathe' by simple diffusion of oxygen from the water around them.  they don't have much of a metabolism, so don't require huge amounts of oxygen.\n\ncrabs and prawns are both crustaceans, and breathe through series of leaf-shaped gills under their abdomen called phyllopods.\n\nsea stars i can't recall for sure, but i think they also breathe primarily through diffusion between their skin and the water (again, not terribly active, so low metabolic needs).\n\noctopus breathe through large feathery gills inside their mantle.  each gill has its own associated heart to help spread the oxygenated blood around the body.\n\nsea snakes have lungs just like you or I do (although one lung is usually very tiny or even totally missing) and need to breathe air.  they swim to the surface every so often to take a breath before diving back under the sea.
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Shrimps have a complete digestive system, i.e. starts at the mouth and ends at the an.us. They begin by ingesting food, part of it gets digested, and part of what they digest gets absorbed by the intestins. The rest is wastes and goes out at the an.us.
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Marine invertebrates usually consist of the phylum porifera, cnideria, coelenterata, arthropoda and mollusca.\nInvertebrates like zooplankton are the major source of food for marine filter feeders like whales. Sponges are known for their beauty and some sponges are used as bath sponges.Jelly fish are useful scavengers.Arthropoda are widely used by humans as seafood -- namely crabs, prawns, lobsters etc. Mollusca are also used as seafood, and for the immensely profitable pearl industry.
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water vascular system helps the echinoderms in circulating the food & waste materials.....moreover it helps in their locomotion....
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Not much. They don't have "guts" like more advanced animals. They do have specialized layers of cells that do different jobs. They have a thin layer of clear "skin" that has nerve cells underneath it, so they can sense prey and predators. They also have a hollow cavity with digestive cells (sort of like a very primitive stomach) inside them. They also have muscles that control their "hydrostatic skeleton" -- basically, another hole that fills up with water, and the muscles make to pulsate so they can swim.\n\nMost of a jellyfish is water. Water is what fills up the body and gives it shape. Outside the water, it's just a blob.
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Mouth, stomach, intestines.