[Structural bases of the barrier-protective function of the stomach and small intestine].

The gastrointestinal tract acts as a barrier-protective tool in addition to its digestive and transport functions. The structural bases of the barrier protective function of the stomach and small intestine were shown in health, duodenal ulcer (DU), experimental gastroduodenal ulcers (GDU), vagotomy, and peritonitis in case of the interaction of these structures with parietal microflora (PM) which may be a valid criteria for assessing the barrier-protective function. PM increases in number in DU, GDU, vagotomy, and peritonitis. Various modifying interventions can normalize this parameter. Identifying the components of protective levels makes it possible to differentiate the affect of protective levels and makes it possible to differentiate affect some links of the barrier-protective function in order to restore it or prevent its disturbance.