Uranium is not necessary for the organism of any living form.
our body lacks enough fluid to function properly.
you get wet uranium
Formation of an alloy uranium-titanium.
Nothing, if the uranium is non-irradiated.
Formation of a uranium-mercury amalgam
For example, metallic uranium is soluble in nitric acid.
Uranium doesn't react with copper.
Uranium enter in the human body by ingestion or inhalation.
Uranium ores are transformed in uranismoctoxide, uranium metal, uranium dioxide, ammonium diuranate, uranium tetrafluoride, uranium hexafluoride etc. Another step is to prepare uranium alloys, uranium dioxide sintered pellets, enriched uranium - in other plants.
It is difficult to loss uranium today; but if it is lost or stolen should be of course sought !
Stargardt's disease
Yes, uranium can leave rays which can pass the body and cause cancer or death.