哺乳动物小肠隐窝上皮是体内更新率高、对电辐射极为敏感的组织。在骨髓型急性放射病中,由于小肠上皮细胞的再生能力很强,故损伤很快即得以修复。照射剂量进入到肠型放射病范围时,隐窝上皮细胞的再生能力随着照射剂量的增加而减弱,超过一定剂量以后即不见再生而只有残留的隐 Mammalian small intestine crypt epithelium is the body of high rate of update, is extremely sensitive to electrical radiation. In acute myeloid leukemia, because of the regenerative capacity of small intestine epithelial cells, the injury is quickly repaired. Irradiation dose into the scope of intestinal type radiation sickness, the regenerative capacity of crypt epithelial cells with the dose of irradiation weakened, beyond a certain dose that is not the only regeneration and residual residue