Cell suspension is a technique used in biology where cells are dispersed in a liquid medium. This allows researchers to study the behavior, growth, and characteristics of individual cells or groups of cells without the influence of surrounding tissues. Cell suspensions are commonly used in various applications, including drug testing, cell culture, and genetic studies. In a cell suspension, cells can be derived from different sources, such as tissues, blood, or cell lines. The liquid medium typically contains nutrients and growth factors to support cell viability. This method is essential for experiments that require a controlled environment to analyze cellular responses and interactions.