Laboratory testing is a scientific process used to analyze samples, such as blood, urine, or tissue, to diagnose diseases, monitor health, or evaluate treatment effectiveness. These tests are conducted in controlled environments, known as laboratories, where trained professionals, like medical technologists, use specialized equipment and techniques to obtain accurate results. The results from laboratory tests help healthcare providers make informed decisions about patient care. Common types of tests include blood tests, urinalysis, and biopsies. Each test serves a specific purpose, providing valuable information about a person's health status and guiding further medical interventions if necessary.