Animal cell culture is a common laboratory technique for maintaining live cells separated from their original tissue (primary cells) or immortal cells (cell lines). The technique of cell culture was discovered in the 19th century after the discovery of the microscope.Presently, the culture of cells is one of the most important tools of life sciences research and is being used by investigators to understand advanced understanding of cell growth and differentiation and mechanisms of normal/ abnormal functioning of various cells. In addition to that, cell culture is employed in the generation of vaccines, the production of pharmaceutical proteins, and the safety testing of drugs.