ex vivo

Ex vivo (Latin: "out of the living") means that which takes place outside an organism. In science, ex vivo refers to experimentation or measurements done in or on tissue from an organism in an external environment with the minimum alteration of natural conditions. Ex vivo conditions allow experimentation on an organisms cells or tissue under more controlled conditions than is possible in in vivo experiments (in the intact organism), at the expense of altering the "natural" environment.