The present state of the problem.- Experimental material and method.- Section I. Physiological and Morphological Changes in Animals Exposed to Radio Waves of High Intensity.- 1. Morphological and physiological changes following exposure to high-intensity microwaves (centimeter, millimeter, and decimeter bands).- Morphological changes following exposure to high-intensity centimeter waves.- Morphological changes following exposure to high-intensity millimeter waves.- Morphological changes following exposure to high-intensity decimeter waves.- 2. Morphological changes in animals following exposure to ultrashort waves (69.7, 155, and 191 MHz) of high intensity.- 3. Morphological changes in animals exposed to short and medium radio waves of high intensity..- 4. Comparison of morphological changes following exposure to radio waves of high intensity and of different frequencies.- Conclusion.- Section II. Physiological and Morphological Changes in Animals after Prolonged and Repeated Exposures to Low-Intensity Radio Waves of Different Frequencies.- 1. Morphological changes following prolonged and repeated low-intensity microwave irradiation.- Morphological changes following prolonged and repeated irradiation with low-intensity centimeter waves.- Morphological changes following repeated irradiation with low-intensity millimeter waves.- Morphological changes following repeated irradiation with low-intensity decimeter waves.- 2. Morphological changes in animals following repeated low-intensity irradiation with ultrashort waves.- 3. Morphological changes in animals following repeated irradiation with low-intensity short waves.- 4. Morphological changes in animals following repeated irradiation with low-intensity medium waves.- 5. Comparison of morphological changes following repeated exposure to low-intensity radio waves of different frequencies (microwaves; ultrashort, short, and medium waves).- Conclusion.