Stomach lining. Coloured scanning electron micrograph (SEM) of the epithelium of the stomach lining, or mucosa. This surface epithelium of simple columnar cells secretes mucus, which protects the stomach lining from digestive acids and processes acting on food in the stomach. The boundaries between the cells are strengthened against mechanical and chemical damage. The gastric wall is thrown into folds, all of which are folded again on a smaller scale. Some of the cells in the lining (not seen) are specialized to secrete hydrochloric acid, digestive enzymes and hormones. Magnification: x30 at 6x7cm size. x45 at 4x5 inch size. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / EYE OF SCIENCE |
Taille de l’image : | 2916 px × 3539 px |
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Property Release : | Non requis |
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