We also consider information on fission products that are biological ly
fmportant (Chapter IV).
Specifically, we discuss fn detail {sotopes of
iodine, strontium, and cesium (Chapters V, VI, and VIJ, respectively).
These
radionuclides are components of radioactive fallout and are readily taken up
by the body,
Finally, we also examine data for plutonium (Chapter VIII) and uranfum
(Chapter IX).
These last two elements, not produced by fisston but rather
used in producing it, are generally consumed in the fission reaction.
Those
atoms that escape fission, however, can be dispersed and may present potent fa!
environmental and health hazards.
For each of the radtonuclides discussed, we consider emvtrornmental pathways that are available for the eventual exposure to human populations and the
metabolic pathways thet determine the tissues at risk following exposure.
We
also consider the radfobiological effects of exposures given at high levels,
and, when appropriate, the risks sccanpanying low-level exposures.