Tissue preservation refers to the methods used to maintain the structure and function of biological tissues for study or medical purposes. This process is essential in fields like pathology, where preserved samples are examined to diagnose diseases. Common techniques include freezing, chemical fixation, and dehydration, which help prevent decay and maintain cellular integrity. In research, preserved tissues can be used for various analyses, including histology and immunohistochemistry. These techniques allow scientists to study the microscopic structure of tissues and the presence of specific proteins, aiding in understanding diseases and developing treatments. Proper preservation is crucial for accurate results in both clinical and research settings.