Why does stomach acids do not damage?

The stomach is protected from the corrosive effects of its own acids by a number of mechanisms. These mechanisms include:

* The mucosal barrier: The stomach lining is covered in a thick layer of mucus that helps to protect it from acid. This mucus is produced by specialized cells in the stomach called goblet cells.

* The bicarbonate barrier: The stomach also produces bicarbonate, which helps to neutralize acid. Bicarbonate is produced by parietal cells in the stomach.

* The tight junctions between cells: The cells that line the stomach are tightly connected to each other, which helps to prevent acid from leaking out.

* The rapid turnover of cells: The cells that line the stomach are constantly being replaced, which helps to remove damaged cells that have been exposed to acid.

These mechanisms work together to protect the stomach from the corrosive effects of its own acids. If any of these mechanisms are damaged, it can lead to stomach ulcers or other problems.