The<unk>  is an example of a rapid, multi test system used in identification of unknown oxidase- negative,  gram- negative, rod shaped bacteria of the family Enterobacteriaceae. It consists of a tube with a flat side and contains 12 compartments for different biochemical tests. Although the manufacturer is continuously improving the accuracy of this system, it is worth noting that this system may sometimes yield false results.
Enterotube II
Interstitial cell of Cajal
Junctional epithelium
Epithelium
Lamina propria
Association fiber
Interneuron
Alpha cell