Laboratory testing refers to the analysis of samples, such as blood, urine, or tissue, to diagnose medical conditions or monitor health. These tests are conducted in controlled environments, known as laboratories, where trained professionals use specialized equipment and techniques to obtain accurate results. The results from laboratory testing help healthcare providers make informed decisions about patient care. Common tests include blood tests for checking cholesterol levels, urinalysis for detecting infections, and biopsies for identifying cancer. Accurate laboratory testing is essential for effective treatment and disease management.