Figure 3: TEM showing 129 W9.5ES cells. (A) n: nucleus, nu: nucleolus, m: elongated mitochondria, mv: microvilli. (B)m: large poorly developed mitochondria, reticular form of mitochondria (*), rb: residual body. (C) m: juvenile mitochondria, cp: cell processes, lipid droplets (arrows head), rer: dilated RER. (D) pv: phagocytic vacuole, ly: lysosomes. (E) dj: dismosomal-like junction, stalks of RER (arrows), g: Golgi apparatus. (E) m: small poorly developed mitochondria.