Figure 4: A photomicrograph of a cross section in the jejunum of adult male albino rat of: a) group I showing strong reaction of alkaline phosphatase enzyme on the brush border of the villi (black arrows) and among the crypts (red arrows). b) group III showing weak reaction of alkaline phosphatase enzyme (arrows). c) group IV showing weak reaction of alkaline phosphatase enzyme on the brush border of the villi and among the crypts (arrows). d) group V showing moderate reaction of alkaline phosphatase enzyme (arrows). e) group IV showing moderate reaction of alkaline phosphatase enzyme on the brush border of the villi and among the crypts. (DAB X 100).