in vivo

https://doi.org/10.1351/goldbook.I03154
In the living body, referring to a study performed on a living organism.
See also:
in vitro
Source:
PAC, 1993, 65, 2003. (Glossary for chemists of terms used in toxicology (IUPAC Recommendations 1993)) on page 2061 [Terms] [Paper]