Food Digestion and digestion means digesting food (food) to substances which the body can be included. This happens in the digestive tract, body cavities and tubes in which the digestive process takes place. The term digestion in molecular biology also used for fragmentation of proteins by enzymes, a process that, among others, also occurs in the stomach.
It puts food in humans following road:
Mouth, in the mouth food through the teeth in small pieces and grind the food comes into contact with saliva. This contains certain enzymes - such as amylase - already start converting food into nutrients. Amylase breaks down starch. This results in maltose, a disaccharide, which ultimately will be converted into glucose.
* Esophagus, besides moving the food from the mouth to the stomach, digestion of carbohydrates is also a function of the esophagus.
* Stomach, gastric pull together and grind the food so nice. Through the acidic environment that prevails, a large proportion of the food came along with dead bacteria, and the salivary amylase inactivated. Epithelial cells in the stomach lining produce hydrochloric acid (heartburn) and pepsinogen, a proenzyme. Under the influence of hydrochloric acid, pepsinogen is converted to peptase that ensures that proteins can be converted into shorter polypeptides. The stomach takes care of the absorption of alcohol and aspirin.
* Duodenum, juices from the pancreas neutralize the acid from the stomach mass. Additionally, the bile acids from the gall bladder to emulsify fats so that they can be transformed by lipase into fatty acids and glycerol.
* Small intestine, in the small intestine are villi. The villi take nutrients into the blood.
* Large intestine, large intestine, the last nutrients such as bile salts, vitamin B12, electrolytes and water (9 liters, of which 1.5 liters from the diet).
* Rectum; gathering place for relief.
* Anus; indigestible remains of food and waste products from the liver to be here approximately once a day as relief from the body.