Inhaled and ingested particles are removed from the body in much the same way as inhaled and ingested dust, unless the substance is one that is incorporated into tissues. Even in that case, the exposure is still low and the body will get rid of it in a fairly short amount of time anyway. The matter that makes up your body has a high turn-over rate.
Did you forget your </sarc> tag???
From 1961: Effects of Inhaled Radioactive Particles
And if there's any doubt about 50+ years of data analysis:
From US EPA, Radiation Protection - Exposure Pathways
Inhalation Exposure by the inhalation pathway occurs when people breathe radioactive materials into the lungs. The chief concerns are radioactively contaminated dust, smoke, or gaseous radionuclides such as radon. What happens to inhaled radioactive materials?
Radioactive particles can lodge in the lungs and remain for a long time. As long as it remains and continues to decay, the exposure continues. For radionuclides that decay slowly, the exposure continues over a very long time.
Inhalation is of most concern for radionuclides that are alpha or beta particle emitters.
Alpha and beta particles can transfer large amounts of energy to surrounding tissue, damaging DNA or other cellular material. This damage can eventually lead to cancer or other diseases and mutations.