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Biology 2nd Baccalaureate

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3.3.2. Diseases in the stomach

Stomach diseases


The gastritis is inflammation of the gastric mucosa, which is the layer of cells lining the stomach, by excess secretion of hydrochloric acid.

The most common symptoms are heartburn and pain, nausea, vomiting, belching, etc.

It is caused by the ingestion of an irritating substance such as spicy foods, alcohol, coffee, tea, cola, food in bad condition, some medications, smoking, etc. They are also associated with stressful situations, in which there is an excessive secretion of hydrochloric acid . Another cause may be that little protective mucus is secreted, so the mucosa is attacked by gastric juice.

The treatment of gastritis consists of taking antacids and having a diet with lighter foods to facilitate its digestion.

Gastric ulcer

gastric ulcer is a wound caused by the destruction of the stomach lining, which can lead to bleeding and even perforation of the stomach wall.

It occurs when hydrochloric acid that helps digest food damages the wall of the stomach or duodenum. The most common cause is infection with the Helicobacter pylori bacteriaSome factors that favor the appearance of ulcers are the prolonged use of some medications such as aspirin and ibuprofen, stress, spicy foods, alcoholtobacco, etc.


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Biology and Geology teaching materials for Compulsory Secondary Education (ESO) and Baccalaureate students.