Cytomembrane System <span>Membranes physically connected or connected by transfer of vesicles. </span> <span>Membranes exhibit various thicknesses, composition and behavior, both in space and time! </span> <span>Organelles included: </span> <span>endoplasmic reticulum (ER).</span> <span>nucleus. </span> <span>Golgi apparatus. </span> <span>lysosomes, vacuoles and microbodies.</span>