In situ
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In situ is a Latin phrase meaning 'in the place' or 'on site', derived from in and situ. The term refers to studying or working with something in its natural or original location rather than moving it
William Molins' Myskotomia (1648), showing the term in situ in an anatomical context. The Oxford English Dictionary cites this as the earliest known use of the phrase in English.
Gene expression of collagen in Iberian ribbed newt, via Hybridization Chain Reaction RNA Fluorescence In Situ Hybridization
Photo of Orion taken during the flight of Artemis I
Disassembled CTD device, showing pressure housing, sensor cage, connectors, and internal electronics with sensors for conductivity, temperature, and pressure
In vivo
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Studies that are in vivo are those in which the effects of various biological entities are tested on whole, living organisms or cells, usually animals, including humans, and plants, as opposed to a ti
In situ
…medical terminology, in situ belongs to a group of two-word Latin expressions, including in vitro ('within the glass', e.g., laboratory experiments), in vivo ('within the living', e.g., experiments on living organisms), and ex vivo ('out of the living', e.g., experiments on extracted tissues). These expressions…
A laboratory rat with a brain implant, that was used to record in vivo neuronal activity