What defines cell-cell interactions?

Cell-cell interactions refer to the communication and relationships between different types of cells. These interactions are crucial for numerous physiological processes, such as tissue formation, immune responses, and cellular signaling. Through various mechanisms, including direct contact, signaling molecules, and cell adhesion, cells influence each other's behavior, which is essential for maintaining homeostasis and coordinating functions in multicellular organisms. Understanding cell-cell interactions helps to elucidate complex biological systems, including how tissues and organs develop and function cohesively.