TEM of two adjacent steroid-secreting cells from the zona fasciculate shows features typical of steroid-producing cell : lipid droplets (L) containing cholesterol esters, mitochondria (M) with tubular and vesicular cristae, abundant SER, and autophagosomes (A), which remove mitochondria and SER between periods of active steroid synthesis. Also seen are the euchromatic nuclei (N), a Golgi apparatus (G), RER, and lysosome