What term describes a test or procedure that involves penetrating or entering the body?

The term that describes a test or procedure involving penetration or entry into the body is "invasive." Invasive procedures often involve instruments or devices that penetrate the skin, mucous membranes, or other bodily layers. This can include surgeries, biopsies, or any technique that requires an incision or puncture.

Invasive tests are typically used to obtain samples, diagnose diseases, or perform specific medical interventions. Because they break the skin or enter a body cavity, these procedures carry certain risks, such as infection or complications related to anesthesia. Understanding the nature of invasive versus non-invasive testing is crucial in health science, as it helps healthcare providers make informed decisions about patient care, considering both the potential benefits and risks associated with the techniques used. The other options refer to various medical approaches but do not encapsulate the concept of penetrating or entering the body.