Their rough endoplasmic reticula were few with 3-5 or even more round or pigment granules in cytoplasm.

Second, a shedding of cell processes or segments of the cells containing rough endoplasmic reticula might occur to release procollagen into the matrix.

All the cortex cells contained abundant lysosomes, mitochondria and endoplasmic reticula, but the lipid droplets in different zone cells varied in number, size, shape and electron density.