Frog And The Digestive System

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2. Frogs:
a) Digestive System:
The digestive system of a frog consists of the following part shown in Figure 5. The mouth of the frog located at the anterior end is made of an upper and lower jaw bone. The mouth is responsible to take in the food. From there, the food is lead towards the esophagus which is connected to the stomach. The esophagus is a tube-like structure responsible for transporting the food to the stomach allowing the process of digestion to continue. The stomach is a muscular organ and considered to be the widest part of the digestive tract. This organ is responsible for continuing the chemical and physical process of digestion. From the stomach, the food moves into the small intestine, where most of the digestion occurs.
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The digestive system begins at the mouth. The food goes in the mouth where the food is chewed and breaks into smaller pieces that are more easily digested. Saliva is then mixed with food and then taken down the esophagus. The esophagus is a tube-like structure responsible for transporting the food to the stomach allowing the process of digestion to continue. The stomach is responsible for continuing the chemical and physical process of digestion. From the stomach, the food moves into the small intestine, where most of the digestion occurs. The small intestine extends from the stomach to the large intestine and is responsible for the digestion and absorption of food. The liver, pancreas, gall bladder, and bile duct are attached to the digestive system by ducts also known as bile. The liver is located on both sides of the heart and contains three lobes (sections). It is the largest organ in the body and is responsible for detoxifying the blood and clearing out harmful materials. The pancreas is an organ where enzymes (digestive juices) are produced to break down food. The gall bladder is located under and attached to the liver. It is a small, round sac responsible for storing and concentrating bile. The bile duct is a duct that carries bile from the liver and gall bladder and takes it to the duodenum. From the small intestines, the remaining undigested food go to the large intestines. The large intestine absorbs water from remaining matter. In the large intestines, liquid wastes travels to the urinary bladder then going to the cloaca while the solid wastes go straight to the cloaca. The cloaca is an outlet through which intestinal, genital, and urinary tracts open. All excess liquid and solid wastes exit the body from the anus. (Barren, Frog Dissection Manual, pg. 3, 4,

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