* In vitro: This term specifically refers to experiments or procedures conducted outside of a living organism, typically in a test tube or other controlled environment.
* Ex vivo: This term refers to experiments or procedures conducted on tissues or organs that have been removed from a living organism.
* Non-invasive: This term describes procedures that do not involve entering the body or disrupting the organism's tissues.
* Observational: This term is broad but can be used if the procedure involves simply observing something without manipulating it.
* Indirect measurement: This term can be used if the procedure measures something that is not directly observed but is related to the target of interest.
The most appropriate term will depend on the specific details of the procedure. If you can provide more context, I can help you choose the most fitting term.