in vivo

In vivo refers to experiments or processes that occur within a living organism, such as a person, animal, or plant. It contrasts with in vitro, which are studies done outside the organism, typically in a lab setting like test tubes or petri dishes. In vivo research helps scientists understand how treatments or biological processes work naturally inside the body, reflecting more accurate biological responses. For example, testing a new drug in a living animal to see its effects is an in vivo experiment. This approach is essential for understanding complex interactions that can't be replicated outside the organism.