Final Answer:
Cells grown in culture, outside the body, are called "in vitro" cells. They have become an essential tool for cell and molecular biologists.
Step-by-step explanation:
Cells cultured outside the body are commonly referred to as "in vitro" cells. In vitro, which translates to "in glass," signifies the artificial environment in which these cells are grown, typically in laboratory glassware or culture dishes. Cultured cells have become a fundamental tool for cell and molecular biologists, enabling the study of cellular behavior, responses to stimuli, and the investigation of various biological processes. This controlled environment allows researchers to manipulate and observe cells under specific conditions, facilitating experiments that would be challenging or impossible within a living organism.