Digestive system

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  • Publicado : 25 de agosto de 2010
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* VIABILITY: The digestive system, through enzymes and hydrochloric acid, it can absorb the nutriments and get rid of bacteria that get introduced with the food.

* ENERGY: Enzymes from saliva, some stomach juices, and help from bacteria, known as gut flora are important energy for good digestion.

* SYNERGY: All the organs (mouth,pharynx, esophagus, stomach, small intestine and large intestine) must coordinate during the transportation, transformation and absorption of food, to carry out with the correct digestive process.

* ENTROPY: Occurs when what is ingested doesn’t bring any benefits to the digestive system like nutriments or energy, but instead, it’s excluded by the system as bacteria or food waste.

*INTERACTION: The digestive system requires help from other systems to carry out with its functions. The circulatory system and the digestive system work together to transport nutriments that are absorbed; with the nervous system, through its motor functions; endocrine who produces gastric juices, respiratory system, among others.


The digestive system is also known bya number of other names, including the gut, the digestive tube, the alimentary canal, the gastrointestinal tract, the intestinal tract, and the intestinal tube. The digestive system consists of the mouth, esophagus, stomach, and small and large intestines, along with several glands, such as the salivary glands, liver, gall bladder, and pancreas.
* OBJECTIVE: The digestive system is a group oforgans and tissues responsible for the conversion of food into absorbable chemicals which are then used to provide energy for growth and repair.

* WORK PLAN: The glands in the digestive system secrete digestive juices containing enzymes that break down the food chemically into smaller, more absorbable molecules. In addition to providing the body with the nutrients and energy it needs tofunction, the digestive system also separates and disposes of waste products ingested with the food.
Food is moved through the alimentary canal by a wavelike muscular motion known as peristalsis, which consists of the alternate contraction and relaxation of the smooth muscles lining the tract. In this way, food is passed through the gut in much the same manner as toothpaste is squeezed from a tube.Churning is another type of movement that takes place in the stomach and small intestine, which mixes the food so that the digestive enzymes can break down the food molecules.
Food in the human diet consists of carbohydrates, proteins, fats, vitamins, and minerals. The remainder of the food is fiber and water. The majority of minerals and vitamins pass through to the bloodstream without the needfor further digestive changes, but other nutrient molecules must be broken down to simpler substances before they can be absorbed and used.


* EFFECTIVENESS: Food in the stomach is broken down by the action of the gastric juice containing hydrochloric acid and a protein-digesting enzyme called pepsin. Gastric juice is secreted from the lining of the stomach walls,along with mucus, which helps to protect the stomach lining from the action of the acid. The three layers of powerful stomach muscles churn the food into a fine semi liquid paste called chyme.

EFFECTIVELY: The small intestine is where most chemical digestion takes place. Most of the digestive enzymes that act in the small intestine are secreted by the pancreas and enter the small intestine viathe pancreatic duct. The enzymes enter the small intestine in response to the hormone cholecystokinin, which is produced in the small intestine in response to the presence of nutrients. The hormone secretin also causes bicarbonate to be released into the small intestine from the pancreas in order to neutralize the potentially harmful acid coming from the stomach.
The three major classes of...