
Rough endoplasmic reticulum
This electron micrograph shows a cell with extensive RER, indicating that it is actively synthesizing protein (translation) for secretion. At the light microscopic level, these regions of RER stain blue with hematoxylin. Also visible are mitochondria, lipid droplets, glycogen granules and a portion of the nucleus. Liver 8000x

RER >
RER consists of a system of interconnected, flattened, membranous sacs or cisterns which have ribosomes on their outer surfaces. In this image, RER fills most of the cytoplasm. Secretory proteins produced by the surface ribosomes enter a space between the membranes. The RER membrane is continuous with the outer nuclear membrane.

Nucleus
This electron micrograph shows a cell with extensive RER, indicating that it is actively synthesizing protein (translation) for secretion. At the light microscopic level, these regions of RER stain blue with hematoxylin. Also visible are mitochondria, lipid droplets, glycogen granules and a portion of the nucleus. Liver 8000x

Mitochondria
This electron micrograph shows a cell with extensive RER, indicating that it is actively synthesizing protein (translation) for secretion. At the light microscopic level, these regions of RER stain blue with hematoxylin. Also visible are mitochondria, lipid droplets, glycogen granules and a portion of the nucleus. Liver 8000x

Lipid droplets
This electron micrograph shows a cell with extensive RER, indicating that it is actively synthesizing protein (translation) for secretion. At the light microscopic level, these regions of RER stain blue with hematoxylin. Also visible are mitochondria, lipid droplets, glycogen granules and a portion of the nucleus. Liver 8000x

Glycogen
This electron micrograph shows a cell with extensive RER, indicating that it is actively synthesizing protein (translation) for secretion. At the light microscopic level, these regions of RER stain blue with hematoxylin. Also visible are mitochondria, lipid droplets, glycogen granules and a portion of the nucleus. Liver 8000x