Here are a few notes about the biological role of tantalum.
Tantalum has no biological role.
Possibly some tantalum compounds cause tumours. The following gives the abundances of the elements in humans . Just enter your weight in either kilograms or pounds. In some browsers, after entering your weight you may have to click outside the text entry box to make the calculation work. Elements for which there are no data will always give a value of zero for the weight, no matter what you put in the weight box.