Food is the body's fuel. But before any use is made, it must be properly processed. The body's food processing plant is a 10-meter (33ft) long, muscular canal that begins in the mouth and ends in the anus.
When food comes into the mouth, the taste and temperature are tested by the tongue. Solid teeth are injured by the forearm teeth (tooth decay), then the back teeth or moles are chewed. Even before the food tastes, and during chewing, the saliva passes through the mucous membranes to the oral mucosa near the lower jaw.
Saliva moistens foods and enzymes with initial digestion. When it is ready to swallow; the original gauze was converted to a soft ball which was called a bolus and heated or cooled to the appropriate temperature.
Although fast, this section is actually quite complex. First, the tongue pushes the bolus of the food into the cavity embedded in the muscles in the mouth of the mouth and in the back of the mouth: the throat. After the food is in the hopper, several activities take place in a few seconds to prevent swallowing against breathing.
From the hopper, the bolus now passes through the esophagus or into the esophagus, the tube joining the mouth to the stomach. The bolus falls not only in the esophagus due to gravity, but also by the waves of muscular action called Peristaltics.
Except for meals, the esophagus is kept closed by a ring of muscles called a heart muscle that follows the high acid content of the stomach after regurgitation in the esophagus. Because the bolus of food reaches the esophagus, the sphincter relaxes to open the path in the stomach.
The stomach is a confusingly muscular bag designed to store food (so you do not usually have to eat a small meal all day), mix the food with different digestive juices and then slowly release it into the gut.
The food mixes as the stomach is tied and relaxed and the peristaltic waves move. By the time he had spent two or six hours in the stomach, partially digested foods were replaced by a variety of chemicals to a liquid called chyme.
Exit gastric by the muscle known as pylor sphincter. As peristaltic waves press the stomach through the stomach, the sphincter lowers the streak into the small intestine in small amounts. The small intestine is actually the longest part of the eating channel, its size is 20ft (6m), and its name is not its length but its width – about 1 inches (4cm). Most of the digestion process occurs in the small intestine, not only due to the effect of the intestinal tract, but also of the digestive tract caused by the liver (epithelium) and the pancreas (pancreas).
As peristaltic waves move along the small intestine, they get some other thorough mixing. If more food is left in the stomach, the small intestine opens and the chyme passes through the colon, a tube is ca. 3ft (1.5m) long and an average diameter of 7.5cm.
In the colon, water is absorbed into the blood from digestive liquid residues. By the time these remains reach the anus, they are in the form of a solid feces. Instead of the continuous contraction of the peristalsis, the gradually more solid residues are moved by enormous propulsions, which occur only a few times a day.
Finally, the faeces enters the anal canal, which is closed by the last lair canal in the eating channel. From the beginning the sphincter opens automatically when the anal channel is full. But as the nervous system matures, we learn to override the automatic signals.
The gullet works about 35 tons of food in an average of 70 years. No wonder, then, that it sometimes fails. Some eating disorders are so common that they have become domestic words – ulcers, infants, constipation, diarrhea, and heartburn – to name but a few. While some are unavoidable, there are methods for a healthy digestive system.
- Do not eat (or nourish the kids) too much. This will burden digestion and cause weight problems. In infants, vomiting and regurgitation may occur.
- Before he rolls, he'll chew his food. Digestion of carbohydrates begins in the mouth, ptyalin, the saliva enzyme.
- Contain enough fiber in the diet – fruit on the skin, slightly boiled vegetables, bran with breakfast cereals. Dietary fiber can not be digested with the canal, but it also stimulates the passage of food into the colon, helping to prevent constipation and possible bowel diseases.
- Avoid foods that you or your family respond badly.
- Minimizing stress. This increases the acid secretion of the stomach and the whole musculature of the system, which causes the food to become too fast to not digest properly.
- Do not stop smoking, cut it off as it stimulates acid secretion like stress.