What the digestion ? And The pharynx and esophagus.

What the digestion ? And The pharynx and esophagus.

What the digestion ? And The pharynx and esophagus.

The energy needed for all the processes and activities that take place in our body is derived from the food we eat. The digestive system allows us to use food from sources as varied as the flesh of an animal and the roots of a plant, and we use them as a source of energy. If the ability to coordinate the food machines without damaging the tongue and lips, or the propulsion of food from the stomach to the duodenum, while releasing the appropriate enzymes, our digestive system allows us to manage the process and often without Think a lot while doing other tasks.

What the digestion?

What the digestion ? And The pharynx and esophagus.

The process of digestion is fascinating and complex that takes the food we put in our mouth and turns it into energy products and waste. This process takes place in the gastrointestinal tract, a long tubular structure, connected, from the mouth and ends with the anus. The food is propelled forward in the system, altered by the enzymes and particles used and absorbed hormones on the way. Other organs that support the digestive process are the liver, gallbladder and pancreas. The time required for food from the mouth to be excreted as waste is 30 to 40 hours

mouth

The mouth is the gateway to food, but the digestive system is often prepared before the first bite of food enters our mouth. Saliva is released by the salivary glands in the mouth when we feel the food. Once the food enters the mouth, chewing breaks into smaller particles of food that can be more easily attacked by the enzymes in the saliva. Our teeth can make a cut and a milling function to perform this task. Language helps to mix food with saliva and the tongue and roof of the mouth (soft palate) helps to move food towards the pharynx and esophagus

The pharynx and esophagus

The pharynx (throat) is the transition zone from the mouth to the esophagus. Pharynx There are two ways that the bolus can take; 1) the wrong path, which is downstream from the trachea to the lungs or 2) the correct route in the esophagus and then to the stomach. The act of swallowing is a complex process that closes the trachea (to protect the lungs) and transports the food to the esophagus. This process is mostly automatic (reflex), but it is also partly under our direct control.

Once it enters the esophagus, the food moves through the esophagus and into the stomach. The esophagus is a muscular tube that contracts synchronously (peristalsis) to move food to the stomach. While the muscles behind the food contract, the muscles relax before the meal, causing the forward propulsion of food. Peristalsis is the main mechanism by which food moves through the digestive system.

Once the food approaches the stomach, a muscle valve (lower esophageal sphincter) relaxes and allows food in the stomach. This sphincter has the important function of closing the stomach, so that no food or stomach acid recites the esophagus (thus avoiding stomach acidity or regurgitation).

The stomach and small intestine

The stomach and small intestine

The glands that coat the stomach acids and enzymes are secreted continue the process of decomposing the food. The stomach muscles still mix food. At the end of this process, the food you put in your mouth has been transformed into a thick, creamy liquid called chyme.

This thick fluid is then pushed into the duodenum (the first part of the small intestine). With the help of pancreas enzymes and bile from the liver, an additional food failure occurs in the small intestine.

The small intestine has three segments. The first segment is the duodenum where food distribution takes place. The following two sections of the small intestine (jejunum and ileum) are primarily responsible for the absorption of nutrient processed foods into the bloodstream through the walls of the intestine.

After the small intestine, the remaining remains leaving the upper gastrointestinal tract (upper GI tract) consisting of all above the large intestine and moving in the large intestine or colon (lower GI tract principle).

Colon, rectum and anus

Colon, rectum and anus

The role of the lower gastrointestinal tract is to solidify waste storage residues (water absorption) until it can be evacuated (go to the bathroom) and assist in evacuation.

The large intestine (colon) has four parts:

• ascending colon,
• transverse colon,
• And descending colon
• Colon sigmoid.

Together, the colon is about 7 feet long and connects to the rectum. Here, as in most other parts of the GI system, the waste product moves through peristalsis. Slowly, as waste through the colon, water is absorbed and feces are formed.

Stool colon are stored in the rectum. The anal sphincter provides control over stool release or maintenance. Once the stool reaches the rectum, a reaction in the brain makes the person aware of the need for a saddle. The voluntary control of the anal sphincter allows us to keep the stool until we went to the bathroom.