Ultrastructure of Sheep Primordial Follicles Cultured in the Presence of Indol Acetic Acid, EGF, and FSH
Figure 2
Electron micrography of a normal sheep preantral follicle showing: (a) a centrally located oocyte (O) with intact nucleus (N), surrounded by an organized layer of granulosa cells (GC); (b) an intact nuclear envelope (arrows) between nucleus (N) and cytoplasm (C). Note the presence of heterochromatin (HC) in the nucleus and mitochondria (M) in the cytoplasm; (c) lipid droplets (LD); (d) round and elongated mitochondria (M) associated with profiles of smooth endoplasmic reticulum (SER); (e) Golgi apparatus (G) associated with different sizes of vesicles (V), mitochondria (M), and smooth endoplasmic reticulum (SER); (f) detail of the cortical region of the oocyte (O). Notice the presence of microvilli (MV) in direct contact with the granulosa cells (GCs).
