Plant cell anatomy. a.Generalized drawing.b.Transmission electron micrograph of young leaf cell.See Table 4.1 for a description of these structures. along with a listing of their functions. microtubule -nuclear central vacuole pore -chromatin nuc nucleolus nuclear envelope chloroplast ribosome actin rough ER -smooth ER -plasma membrane -cell wall cytosol Golgi apparatus mitochondrion intracellular space middle lamella cell wall of adjacent cell