rakkude plasmamembraani kindlad piirkonnad, mille kaudu on kõrvutiasetsevad rakud ühendatud omavahel või siis seotud rakuvälise maatriksiga, A cell junction is a type of structure that exists within the tissue of some multicellular organisms, such as animals. Cell junctions consist of multiprotein complexes that provide contact between neighboring cells or between a cell and the extracellular matrix. They also build up the paracellular barrier of epithelia and control the paracellular transport. Cell junctions are especially abundant in epithelial tissues.