1. The Compartmentalization in Eukaryotic Cells Membranes divide the cytoplasm of eukaryotic cells into distinct compartments Three categories in eukaryotic cells: 1)the endomembrane system: ER, Golgi complex, Lys secretory vesicles (2)the cytoso ()mitochondria, chloroplasts, peroxisomes, and the nucleus Membrane-bound structures(organelles) are found in all eukaryotic cells1. The Compartmentalization in Eukaryotic Cells ❖Membranes divide the cytoplasm of eukaryotic cells into distinct compartments. Three categories in eukaryotic cells: (1) the endomembrane system: ER, Golgi complex, Lys., secretory vesicles. (2) the cytosol. (3) mitochondria, chloroplasts, peroxisomes, and the nucleus. ❖Membrane-bound structures (organelles) are found in all eukaryotic cells