Figure 233 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Capturing stages of mitochondrial division in cells from the gastric mucosa of a mole with the electron microscope. A) The free edge of the developing septum has not yet reached the opposite side of the organelle. B) Asymmetrical penetration of the fold of the outer membrane is evident. C)Separation of the daughter mitochondrion is complete. Images by Toku Kanaseki. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.