has_part has part has part apical part of cell GO:0045177 The region of a polarized cell that forms a tip or is distal to a base. For example, in a polarized epithelial cell, the apical region has an exposed surface and lies opposite to the basal lamina that separates the epithelium from other tissue. apical region of cell cellular_component cellular anatomical entity AQP1 CA2 PLAT VCAM1 ITGA8 SLC4A9