The endoplasmic reticulum (ER) is a dynamic and continuous membrane network with roles in many cellular processes. The importance and maintenance of ER structure and function have been extensively studied in interphase cells, yet recent findings also indicate crucial roles of the ER in mitosis. During mitosis, the ER is remodelled significantly with respect to composition and morphology but persists as a continuous network. The ER interacts with microtubules, actin and intermediate …