electron microscopic examination demonstrated the presence of characteristic structures for steroid secretory cells such as many lipid droplets , well developed smooth endoplasmic reticulum , and oval mitochondria with tubular cristae in the theca interna cell of secondary as well as graafian follicles and in the interstitial gland cell of mature rat ovaries .
C0230789
smooth endoplasmic reticulum
C0007634
cell