What is the sticky coating on the outside of cells that keeps them jonied together?

The sticky coating on the outside of cells that helps keep them joined together is primarily composed of glycoproteins and polysaccharides, collectively known as the extracellular matrix (ECM). This matrix provides structural support, facilitates cell communication, and plays a crucial role in tissue formation and maintenance. Additionally, cell adhesion molecules (CAMs) on the cell surface interact with the ECM and other cells, further enhancing cell adhesion and cohesion within tissues.