Anatomy & Physiology › Section U · The digestive system › Topic U.3
The stomach
The stomach is a muscular holding tank that churns a meal with strong acid and releases it a few millilitres at a time. It begins protein digestion, makes the one secretion no other organ can replace, and protects itself from its own juices.
In this topic
- A holding tank, not the main digester
- Regions and shape
- Glands and the cells inside them
- Acid, pepsin and the other enzymes
- Worked example: how acidic is gastric juice?
- Three phases of gastric secretion
- Mixing waves and gastric emptying
- The mucosal barrier
- Worked example: life without a stomach
- Common mistakes to avoid
- Key takeaways
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