Tissue culture, also known as cell culture, is a biological research technique in which cells or tissues are grown and maintained in controlled conditions outside of their natural environment. This allows researchers to study the growth, behavior, and physiology of cells in a controlled setting. Tissue culture is commonly used in various fields of biological research, including cell biology, genetics, and medicine. It can be used to study the effects of different substances on cells, test the efficacy of drugs, and produce large quantities of cells for various applications. Overall, tissue culture plays a crucial role in advancing our understanding of cellular processes and diseases, as well as in the development of new treatments and therapies.