Twelve is a part of the digestive system and is the first part of the small intestine that follows the stomach directly. The 12 essential function is to digest the starch accompanying the food coming from the stomach, where the process of digestion of starchy foods in the mouth by saliva and the second stage in the twelve Pancreatic enzymes.
The name of the twelve is mainly from its anatomical structure, since its length is equal to twelve fingers and is the main reason for its name. The scientific name of the twelve is the intestīnum duodnnum digitrumrum and the length of the twelve finger is approximately 25-30 cm. It is divided into four sections: The first section: It connects between the stomach and the second section, extends horizontally and acts as a conveyor vessel where the food is transferred from the stomach to the intestine, It is 5 cm long.
The second section (known as the descending part): It reaches the second section in the third, and extends vertically, which is longer than the first section, up to 8 cm, which is the most important part of the twelve where it gets digestion basically, and ends with the channel of yellow and pancreas channel where secretion secretions In this section.
Section 3 (known as the horizontal part): extends between the second and third sections, and extends horizontally again, the longest part length of 10 cm.
The fourth and last section (known as the ascending part): the shortest of the 12 parts, the length of which is only 2 cm, between the third section and (the fasting intestine), the second part of the small intestine.
The shortness of the length of the twelve is the miracle of divinity, where a small part does not exceed 25 cm (twelve fingers), which works important in the digestion of food, and if it becomes difficult, it is impossible for us to digest carbohydrates and fats and equal acidity of the stomach and other important functions, This means that this important part prevents the accumulation of fatty substances in the small intestine and then the large, and protects you from chronic constipation can not be solved due to the difficulty digestion of starchy substances that saliva can not digest, and prevents the arrival of acidic substance to the stomach to the rest of the digestive system and thus protects you From the ulcer, he carries his name with him to remember Always small and large effect size, as if he says (twelve finger only and nearly a dozen job!)