The digestive system is a system that processes change the food and absorb nutrients in the form of nutrients needed by the body. The digestive system will break down complex food molecules into simple molecules with the help of enzymes that are easily digested by the body.
Gastrointestinal tract (digestive tract) is composed of digestive tube from the mouth, esophagus, stomach, small intestine, large intestine, rectum and anus.
Inside these hollow organs, there is a layer called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce enzymes to help digest food. The digestive tract also contains a layer of smooth muscle that helps break down food and move it along the tract via peristalsis.
The digestive tract is a continuous channel tube surrounded by muscles. Digestive tract to digest food, break it into smaller parts and absorb part of the head blood vessels. Organs are included in his: mouth, pharynx, esophagus, stomach, small intestine and large intestine. Of colon food will be discharged out of the body through the anus.
2.2. Additional digestive organs (accessories)
This additional digestive organs function to assist in performing its digestive tract. Teeth and tongue found in the oral cavity, gall bladder and digestive gland will be connected to the digestive tract through a channel. Additional digestive gland produces secretions that contribute to the breakdown of food. Teeth, tongue, gallbladder, some digestive glands such as the salivary glands, liver and pancreas.