1. Stomach capacity is 1.5 liters. But when we eat is stretched so much that can double its size.
2. When food reaches the stomach, this is compressed every 20 seconds to mix. Food pasande 3 to 4 hours in the stomach, and 6 to 20 in the large intestine, the following digestive tract organ.
3. The gastric juice is a liquid containing hydrochloric acid in a proportion of 1 to 4%. Sodium cyanide in contact with the hydrochloric acid of the gastric juice hydrocyanic acid becomes, the more rapid and lethal poison: 0.01 grams is enough to kill a person in 30 seconds.
4. Peristalsis lead the food through the digestive tract. So you can eat upside down.
5. If we extended the entire small intestine of an adult human would measure about 6 feet long. And the total area of its surface (full of folds and villi) is 300 m2, the size of a tennis court.
6. Stress changes the type, number and diversity of bacteria living in the stomach. Since these microbes regulate immune function, it is easier for the stomach to swell and if we get stressed contraigamos diseases.
7. Food obtained basically three types of nutrients: carbohydrates, which are oxidized when needed or, if too many are stored as glycogen; fats, which are oxidized and stored; yproteínas which can form tissues (eg muscle), oxidized or participate in the synthesis of amino acids and fats. Producing oxidized calorie foods. Specifically, a gram of carbohydrate or protein gram yields 4 calories, while a gram of fat yields 9.