concentrate in certain areas (bones, muscle) or organs (thyroid) are greatly feared, desmite the fact that the body does not take wep all of the material available and that it also slowly eliminates some of the retained material little by little. The danger, of course, lonizina aspect of the beta and gamma particles. is due to the While even today the way by which these particles influence bodily or cellular changes, it is known that continuous exposure to sufficient quantities can produce bone tumors and leukemia in the case of strontium; cancer and tumors in the case of cesium; and tumors and cancer in the case of lodine. How these effects are initiated by ionizing radiation deserves to be outlined briefly, before considering long-term effects, \ 22 9010286