B Endomembrane system x Endomembrane System The structural and functional elationship organelles including Er, Golgi complex, ysosome, endosomes, secretory vesicles. Membrane-bound structures (organelles) are found in all eukaryotic cells Endocytic Perinuclear space envelopeB. Endomembrane System vEndomembrane System : The structural and functional relationship organelles including ER,Golgi complex, lysosome, endosomes, secretory vesicles. vMembrane-bound structures (organelles) are found in all eukaryotic cells