Cell adhesion refers to the process by which cells interact and attach to neighboring cells or the extracellular matrix. This interaction is crucial for maintaining the structure and function of tissues in organisms. Cell adhesion molecules, such as cadherins and integrins, play a key role in facilitating these connections, allowing cells to communicate and coordinate their activities. The ability of cells to adhere is essential for various biological processes, including embryonic development, wound healing, and the immune response. Disruptions in cell adhesion can lead to diseases, such as cancer, where cells may detach and spread to other parts of the body, highlighting the importance of this fundamental cellular mechanism.