Cell Differentiation. Cell Polarity. Organoid cultures. Cell-Cell Interactions: Adheren junctions, Tight junctions, Desmosomes, gap junctions. Cell-matrix Interactions: Integrins, hemidesmosomes, extracellular matrix, cell attachment, cell spread. Tumor-Stromal interactions. Epithelial-mesenchymal-transition. Ion transporters and Ion Channels. Cytoskeletal changes in epithelial cells: trafficking, anchoring. Cell Signaling: including Cell Death Regulation.