in-between space

The in-between space, also called the "interstitial space," refers to the tiny gaps or areas that exist between the cells or structures within a tissue or material. Think of it as the small room between furniture pieces in a house—it's a space that allows for the movement of fluids, nutrients, waste, or signals. In biological tissues, these spaces are crucial for proper function, enabling cells to communicate and exchange substances. In other contexts, like architecture or materials, it can refer to the gaps that influence how things connect or interact.