Digestive System: Functions of the utmost importance to the human organism
The Digestive System consists of the mouth, pharynx, esophagus, stomach, intestines (large and small), rectum and anus. There are also accessory digestive organs: teeth, tongue, salivary glands, liver, gallbladder and pancreas.
Digestive System Main Functions:
- Food intake through the mouth (ingestion);
- Release of enzymes, acids and water in the gastrointestinal tract lumen.
- Crush, dissolve and mix foods, propelling them through the gastrointestinal tract;
- Digesting food through the process of chemical degradation (large molecules are transformed into smaller ones) and mechanical (ground in the mouth and crushed in the stomach and intestine muscles);
- Absorption of nutrients and other substances that pass from food to blood and lymph.
- Elimination of feces from the gastrointestinal tract (defecation process). Coatings of the gastrointestinal tract, unused cells, bacteria and unabsorbed organic matter are eliminated.