While digestion is its primary function, it also plays an equally important role in communication, through the development of sounds and speech. Login. The mouth of the frog opens into a large, shallow oral cavity, which is called a buccal cavity. The frog is carnivorous, feeds chiefly on earthworms, spiders, snails, fishes, smaller frogs and other small insects which it captures and swallows whole directly into the stomach with the help of protractible tongue. The buccal cavity consists of moist mucous membranes and richly supplied with blood capillaries. It also possesses Meissner plexus formed of nerve cells and fibres. Describe the structure and functions of cavity of frog with well-labelled diagram. These lobules are separated from each other by the presence of connective tissue containing bile capillaries, hepatic ducts, blood sinuses and blood capillaries. The buccal cavity of the frog contains an alimentary canal that is a long coiled tube stretching from the mouth to the chocha. It has no digestive enzymes but it adds water to the food and aids in the digestion of fats by emulsifying them. The tongue is attached in front and free behind. Bile juice also activates the fat digesting enzyme of the pancreas, the lipase. In male frog two openings of vocal sacs are also formed in the angle of the lower jaw on the floor of the pharynx. As the teeth are replaced several times during the lifetime of the frog, so they are called polyphyodont. It is in the form of wide and curved tube and lies between the oesophagus and intestine. It is also composed of the same four coats of the alimentary canal. Ask your question. In this phase, nostrils remain open. (ii) Peptidases includes proteolytic enzymes like erepsin which act on polypeptides breaking them into amino acids. Large surface area. The alimentary canal starts with an aperture which is known as mouth opening. The body plan of frogs consists of well-developed structures which help them in their physiological activities. On the floor of the buccal cavity lies a large muscular sticky tongue. It is divided into many lobes and lobules held together by connective tissue in which are present pancreatic ducts, blood vessels, lymph vessels and nerves. These cells secrete glycogen hormone, which increases the sugar concentration in blood. 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The physical changes are brought about by the peristaltic movements of the alimentary canal, while the chemical changes are brought about by the organic catalysts called enzymes which only hasten the chemical reactions without being changed themselves. But the tooth is attached to the jaw bone. Bile gets stored in a large sac-like structure called gall bladder, which lies between the lobes of the liver. It contains glands in mammal. The pancreatic cells have large nuclei and non-granular cytoplasm. Pepsin is produced in the form of inactive propepsin or pepsinogen which is soon converted into active pepsin by the hydrochloric acid. The throat has multiple functions, the first of which is to enable swallowing in order to control the buildup of excess secretions in the mouth such as saliva and mucus. Bile has no digestive purpose; it only emulsifies fats for proper digestion. In the buccal cavity, the tongue mixes the ingested food with saliva, which is secreted by the salivary glands. These cells are somewhat spherical and arranged in compact groups and take light stain. Log in. Register; Test; Home; Q&A; Unanswered; Categories; Ask a Question; Learn; Ask a Question. D. Roof of buccal cavity only . The hook-like teeth prevent the escape of … The acid also prevents the bacterial decomposition and dissolves the inorganic salts as well as makes the food soft. It is traversed by the common bile duct into which the pancreatic ducts also open which is now called as hepatopancreatic duct. In the peritoneal cavity, the food pipe or esophagus enlarges to merge with the stomach. The recovery stroke of the buccal pump was passive. It is the most important part of the alimentary canal where the digestion of ingested food takes place with the help of certain digestive enzymes secreted by the digestive glands situated in its wall. Frog Anatomy and Dissection . The frog has three respiratory surfaces on its body that it uses to exchange gas with the surroundings: the skin, in the lungs and on the lining of the mouth. The mucosal lining of the intestine consists of two types of cells besides intestinal glands, large goblet cells, and small absorbing cells. digestion of food and the absorption of the same is done here in the small intestine. Peritoneum: Spiderweb like membrane that covers organs. tThe alimentary canal... See full answer below. Join now. These are used to hold the prey until it can be swallowed. After absorption in the lacteals, the glycerol and fatty acids are again converted into fat globules of much smaller molecules. Add a Comment. The acid present in the food stimulates the duodenum to produce secretin and cholecystokinin hormones which pass through the blood and reach the pancreas and liver respectively. Thanks 3. The exocrine part secretes pancreatic juice, which contains many digestive enzymes for the digestion of food. Buccal cavity. It is a thin protective layer composed of coarse connective tissue, elastic fibres, fat, blood and lymph vessels and nerve cells. Each lobule is made up of numerous polyhedral, glandular hepatic cells which contain nuclei and cytoplasm along with protein granules, droplets of fats, glycogen and often black or dark brown pigment granules. The buccal cavity 1. The food gets absorbed, digested, assimilated and egested during this journey. The mouth of the frog opens into a large, shallow oral cavity, which is called a buccal cavity. Maintenance of high concentration gradient. The muscle layers are less developed. Although frogs have two sets of teeth in the buccal cavity, they do not use them to eat their prey. The liver is the largest gland found in the organism’s body. Respiration , nutrition e.t.c. Prussic acid is formed in the body as a by-product and it is harmful. Many apertures open in the pharynx. While completely submerged all of the frog's repiration takes place through the skin. The glycerol can be absorbed easily as it is soluble in water, whereas the fatty acids as such cannot be absorbed as they are insoluble in water. At the same time the intestinal mucosa also secretes the intestinal juice called succus entericus with the help of enterocrinin hormone. 8. It opens into the stomach in such a way that no demarcation line is formed between the oesophagus and stomach. 2012-02-13 15:14:50 2012-02-13 15:14:50. The released energy is utilized to perform various life activities. Assimilated and egested during this journey respires through skin ( cutaneous respiration ) out of the digestive.! About Zoology, frog respires through gills, lungs, buccal cavity of frog are fixed or immovable large cells. Your question function of buccal cavity acts as the prey gall bladder, is found are again converted active! 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