The digestive system of the dog has different organs involved in digestion, from the mouth to the anus, and digestive glands, such as the liver and pancreas.
Foods are crushed in the mouth by the teeth, and soaked with saliva before be swallowed. The dog quickly swallows large enough pieces without chew much.
Many, salivary glands secrete saliva which acts by wetting and lubricating the food. The enzymes in saliva begin the phenomenon of some constituents of food digestion. The food bowl then passes into the pharynx, crossroads of respiratory and digestive tract, and then into the esophagus to the stomach.
The muscles of the esophagus allows the progress of food in his light, but he has no role in digestion.
The stomach of the dog is small enough, its capacity is of the order of one to two liters. But the stomach is a very expandable body. The dog can swallow large amounts of food, his stomach will expand and her belly swell.
The glands of the stomach secrete powerful enzymes and acids capable of digesting what the dog has swallowed. The musculature of the stomach helps digestion and progression of food in the digestive tract to the small intestine.
It measures about six times the length of the dog, or more than three meters… It is in the small intestine that empties bile secreted by the liver and the pancreatic juices.
Along its length, the small intestine is dotted with glands digestive aid.
Digestion ends in the large intestine, where feces are formed. In the large intestine are also synthesized many vitamins essential to the body. Rectum completes the digestive tract. In this portion, the feces are stored until their expulsion.
Two glands and part of rectum, anal glands, secrete a fatty and smelly product that is used to lubricate the passage of feces. The dog liver is composed of four liver lobes. The functions of the liver are many and varied: synthesis of lipids, proteins, synthesis of urea, uric acid, synthesis of blood clotting agents. The liver serves as a reservoir for the blood and vitamins; It is also the body that destroys the toxins.
The liver cells secrete bile that is stored in the gallbladder, before pouring in the small intestine. Bile is mainly used to digest fats.
The pancreas secretes pancreatic juice that allows degradation of food thanks to the many enzymes it contains.The pancreas secretes also insulin and glucagon, glucose regulating hormones.