After the bolus reaches the stomach, the proteases in the gastric juice, start break down proteins into smaller Animo acids. The hydrochloric acid in the gastric juice provides a good condition for the proteases because proteases need to be in an acidic environment to work well. The hydrochloric acid also kills bacteria that is swallowed down with the food. The stomach will churn by contracting and relaxing, breaking down the food into smaller pieces and also mix the food well with the gastric juice.
By the time the food is ready to leave the stomach, the food is already in semi-liquid form, then it proceeds to the duodenum.
Extra info!
- Heartburn occurs when gastric juices is allowed to seep through into the oesophagus, thus inflaming it.
- The stomach cannot digest itself because there is a layer of mucus.The stomach is made out of Five layers which are the mucosa, submucosa, muscularis, subserosa and serosa .
- parietal cells in the stomach produces the hydrochloric acid
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