The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These
nembranes divide the cell into functional and
;tructural compartments, or organelles. In
Eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the golgi apparatus,
Lysosomes, vesicles, endosomes, and plasma (cell) membrane among others. The system is defined more accurately as the set of membranes that form
single functional and developmental unit, either being connected directly, or exchanging material through vesicle transport. Importantly, the endomembrane system does not include the
nembranes of chloroplasts or mitochondria, but might have evolved from the latter.