La digestione | eatparade
Digestion is a biological process, characterized by a set of physical and chemical transformations that foods undergo to become assimilated by the body. It begins in the mouth where food is chewed and came into contact with the ptyalin contained in saliva (before being swallowed), which starts the demolition of carbohydrates; This first stage is called mechanical digestion. Transformed into a mush (bolus), food reaches the stomach, through the esophageal muscles, and is occurring in the stomach digesting itself. In the stomach, absorbs mash of gastric juices and juices are various active substances such as hydrochloric acid and pepsin, which start the demolition of the protein, making it almost liquid called chyme. After this gastric digestion, which lasts two to four hours, partially processed foods pass into the intestine the duodenum where digestion is completed by other substances such as bile, amylase, lipase, trypsin, etc., each active on specific components of food; these digestive enzymes that chemical digestion is made possible. Simple substances thus produced are absorbed through the walls of the small intestine, the intestine is responsible, along with the liver and pancreas, to extract energy and nutritional elements of food and to enter them in our blood; Instead, the undigested substances pass into the large intestine where they are dehydrated and expelled with the faeces.
Digestion is critical because it allows you to extract from food the nutrients that the body needs to produce energy and to survive; without it, the body would be unable to properly eliminate excess waste, to expel what is harmful.
To get a good digestion, you must follow some basic guidelines: the amount of calories per meal; the drinks; the composition of the meal in terms of macronutrients; the speed of chewing and swallowing; the after meal; the exercise.
