Tissues are composed of cells that are held together by a variety of cell to cell junctions created by transmembrane and extracellular proteins and ions. These junctions include: adherence junctions, tight junctions and gap junctions. Adherence junctions are composed of transmembrane proteins cadherin. These proteins require calcium to facilitate their interactions. Certain cadherins are tissue specific ...
Two paragraphs with web references as to the role of cadherins in cell to cell adhesion and their function in the organism as a whole.