Basically, it performs 6 steps:
- Ingestion
- mastication
- digestion
- secretion
- absorption
- excretion.
So the mouth chews food and mixes it with saliva; forms food into bolus and swallows. The esophagus then moves bolus to the stomach through peristalsis. The stomach will store and churn food while the food mixes with digestive juices. When the “food” is in the small intestine, the small intestine will secret enzymes, receive secretions from the pancreas and liver, neutralize the acidity in chime, and absorb nutrients into the bloodstream and lymphatic system. The large intestine will finally create and absorb fat-soluble vitamins, reabsorbs water, forms and eliminates feces.
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