Fig. 2

Models of individual organelles of cumulus granulosa cells (cGC). A SEM image of several characteristic organelles. B,C,D SEM images of three different cGCs showing large nuclei in cells. E 3D model of nuclear structure. F 3D model to show rod- and thread-shaped mitochondria. Most of them clustered together, and a few scattered (colored with pink). G 3D model to show endoplasmic reticulum (ER) with net-like structure and a sheet-like or tubular cavity (colored with green). H 3D model to show lipid droplets in different sizes (colored with orange). I,J,K,L 3D model to show spatial relationship between organelles in a cGC. Note the close contact between mitochondria and ER, warpped the nucleus with lipid droplets scatted peripheral