Small intestine villus. Coloured scanning electron micrograph (SEM) of a freeze fracture section through a villus from the mucosal lining of the small intestine. Villi are finger-like projections that increase the surface area of a structure. Microvilli,just visible across upper centre,further increase the surface area available for food absorption. The outer surface of a villus is mostly columnar epithelium (red). It contains numerous goblet cells (dark pink),which secrete mucus to lubricate food & prevent self-digestion. Within the goblet cells individual mucin granules are seen. Magnification: x2000 at 6x7cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 5298 px × 4266 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |