What are the various types of specimens that can be taken to perform pathology or lab tests?

Various types of specimens that can be taken for pathology or lab tests include blood, urine, tissues (biopsies), saliva, cerebrospinal fluid, and swabs (such as throat or nasal swabs). Each type of specimen is used to diagnose different conditions or diseases, with specific collection methods to ensure accuracy and reliability of test results. Additionally, specimens can be categorized as either diagnostic (for immediate analysis) or monitoring (to track disease progression).