[Protective and repair processes in the small intestine during radiation exposure].

The small intestine as a complex heterostructural organ possesses morphofunctional defence-regenerative mechanisms. All elements of this mechanism suffer in irradiation of the organ especially at ionizing radiation doses causing the acute intestinal syndrome. Regenerative processes in the small intestine are suppressed not only by ionizing radiation but also by the toxic products of exo- and endogenous origin resulting from irradiation of the body.