Gastric ulcer

Gastric ulcer

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Caption: Gastric ulcer. Colour scanning electron micrograph of an ulcer in the stomach. With a pH of 2, the juices produced by the stomach are highly acidic. Normally, the stomach lining is protected by a layer of mucus, but when this barrier is ineffective, the lining itself starts to be digested & the result is an ulcer. The micrograph shows a smooth border of epithelial cells surrounding the round, granular wound; these cells are the body's attempt to repair the injury by covering the ulcer. Around the smooth cells can be seen the rough texture of healthy gastric mucosa. The tissue sample is from a rat but a human sample would looked them same. Magnification unknown.

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Keywords: anatomy, condition, digestive system, disease, disorder, false-coloured, gastric, gastric ulcer, healthcare, human body, medical, medicine, scanning electron micrograph, sem, stomach, ulcer

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