The term “in vivo” is latin for “within the living” and “in vitro” is latin for “within the glass”. Both are commonly used terms within the scientific community to differentiate the type of experiment or study being performed. In vivo means that the study being referred to was performed on a whole, living organism, rather than an organ or a few bits of tissue in a petri dish or test tube, which would be referred to as “in vitro”.
Within the field of microbiology the term “ex vivo” meaning “from the living” is used to refer to live cells cultured from a living organism, as from a biopsy.
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