The term has wide applications in various fields of science. In biology, it is the most usual, digestion is the process by which a living making and separate food waste to absorb nutrients and eliminate the latter first. In humans think of three phases: cephalic or advance preparation that occurs when preparing food, cleaning, cooking or other preparations made before, this makes the cerebral cortex prepare the body to consume.

The gastric digestion stage involves chewing and swallowing food and the processes that take place in the stomach through the release of gastric juices in a process that increases the acidity of stomach contents and other regulatory processes to avoid the acid damage the stomach wall, everything has a total length of two to four hours. Before discussing the next stage should be clear that the information that is already swallowing the food reaches the brain in the form of messages hormone (chemical signal) and travels rather slowly to the brain (actually the brain takes to absorb) so sometimes we are full but your brain has not been realized, hence the need to eat slowly and leisurely, not to overeat.


Then start the intestinal phase is a series of processes involved in bile, pancreatic juices and other secretions ending digestion, absorption and then begins. A good diet will also involve a good digestion. The diet must be varied in that it must include food animal, vegetable, dairy, flour and fruit as the traditionally classified into primary schools. A diet poor in any of these types of foods will result in some kind of digestive problem, and in case of children, to poor development.

In chemistry, talk about acid and basic digestion when organic matter is subjected to the action of strong acids or strong alkalis (now called bases) to be reduced to its elemental composition or at least simpler substances such as sulfuric acid attack a piece of meat to release the nitrogen as ammonia and determining the amount of ammonia can be determined by the amount of nitrogen and with it the proteins in the tissues of the meat. Another way of speaking is in the literary sense, say someone is digesting this or that book when it comes to understanding the content.

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