Digestive function is to convert food into soluble substances that can be absorbed by the fabric.
Chemical and mechanical: This is achieved through two types of actions. mechanical actioncomprises The —>
- Chewing: the food is ground by the teeth
- remixing: the muscular walls of the stomach hoard food with gastric juice
- Peristalsis: movement of the waves of the digestive muscles that move food along different sections
“The chemical action transforms —–>
- Carbohydrates into sugar
- Amino acid protein
- Triglycerides into fatty acids and glycerol
Digestion begins in the mouth where the food is mash by the teeth and mixed with the saliva, which contains enzymes that convert starch into simple sugars.
The final product is chewing bolus and down through the esophagus into the stomach, in which it mixes with the gastric juice, consisting of: hydrochloric acid, pepsin and mucus.
The bowl is mixed to form a semi-liquid mass chyme and is forced through the peristalsis in the small intestine through a muscular valve: the pylorus
The small intestine is about 6 meters long and is divided into:
- The young
In the first part of the small intestine, the digestion is completed, while in the second absorption apparatus occurs substances produced by digestion.
After digestion, nutrients (sugars, proteins, fatty acids and vitamins) are absorbed by intestinal villi and transferred into the blood and lymph vessels.
The residual digestible is pushed through the peristalsis in the colon. Two first sections (blind and colon) have the task of removing water in the undigested material, at the end, is stored in the rectum before it is expelled through the anus.