小肠在哺乳动物胃肠道中的功能,主要是对营养物质的吸收,而其吸收能力则与其长度和粘膜表面积有一定的关系。因此曾有一些学者对人和其它哺乳动物的小肠长度进行过一些测量。也有些人做过一些测量粘膜表面积的尝试。哺乳动物受一定剂量的电离辐射全身或腹部局部照射,甚至照射置于腹腔外的肠道之后,就会发生肠型急性放射病。在这种类型的放射病中,胃肠道,特别是小肠,遭受到严重的辐射损伤。数十年来许多学者对小肠的辐射损伤及修复,不论在形态还是功能 The function of the small intestine in the gastrointestinal tract of mammals is primarily the absorption of nutrients while its absorptive capacity is related to its length and mucosal surface area. Some scholars have therefore made some measurements of the small intestine length of humans and other mammals. Others have done some attempts to measure mucosal surface area. Mammals by a certain dose of ionizing radiation local or abdominal partial irradiation, and even placed in the abdominal cavity after exposure to intestinal intestinal acute radiation sickness. In this type of radiation sickness, the gastrointestinal tract, particularly the small intestine, suffers from severe radiation damage. For decades, many scholars on the radiation injury and repair of the small intestine, both in form and function