Intestinal lining,SEM

Bildnummer 12961090
Intestinal lining,SEM
Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured surface of the small intestine. The surface consists of deep folds,called villi,that have been sectioned in this view. The intestinal surface (red,upper frame) is exposed to food. The underlying structure of this surface is seen in the sectioned area. Surface (epithelial) cells (pink) are supported by connective tissue (light brown) that forms the core of each fold (villus). This central core of connective tissue is known as the lamina propria. This contains large blood vessels,capillaries,some smooth muscle cells and a blind- ended lymph vessel known as a lacteal. The folds increase the area for the absorption of nutrients from food. The height of a villus varies in a small intestine from 0.3 to 0.8 millimetres. Magnification: x800 when printed at 10 centimetres wide.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Gschmeissner, Steve
Bildgröße: 4572 px × 3921 px
Modell-Rechte: nicht erforderlich
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