Figure 8. (A) Mature oocyte. Tubules (SER) and vesicles (V) of smooth endoplasmic reticulum associated with mitochondria (M) to form M-SER aggregates and MV complexes. TEM, bar is 0,5 μm. (B) Early degenerating mature oocyte. Numerous vacuoles (Va) associated with lysosomes (Ly) are found in the ooplasm. TEM bar is 1,2 μm. Nottola et al. (2007) with permission.