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CHAPTER 1 - THE CELL
Histology Guide
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MICROGRAPH

NAME
EM 306 Adrenal Cortex
TISSUE
Adrenal Cortex
(Adrenal Cortical Adenoma)
IMAGE SIZE
11,753 x 8,187 pixels
275 MB
FILE SIZES
26,605 KB (grayscale)
25,461 KB (color)
MAGNIFICATION
Unknown
PIXEL SIZE
0.0624 nm
SOURCE
Ken-ichi Kano
Department of Urology
Niigata University School of Medicine
Niigata, Japan

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University of Minnesota
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Robert L. Sorenson, Ph.D.

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University of Minnesota
Department of Genetics, Cell Biology and Development
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EM 306 Endoplasmic Reticulum

Endoplasmic Reticulum

Transmission electron micrograph (TEM) of a small region of the cytoplasm from a cell in the adrenal cortex.

Endoplasmic reticulum (ER) forms an interconnected network of flattened, membrane-enclosed sacs or tube-like structures known as cisternae. The ER is the site of many cellular activities including the biosynthesis of proteins and lipids.

  • Nuclei (blue)/Nuclear Envelope (purple)
  • (RER, cyan) - cytosolic side covered by ribosomes that form peptides that enter the adjacent cisterna during synthesis.
    • Flattened cisternae
    • Abundant in cells that secrete proteins
  • (SER, yellow) - regions of ER that lack bound ribosomes
    • Network of tubular channels
    • Abundant in cells involved in steroid synthesis
  • (red)
  • Lysosomes (black, ,)
  • Cytoplasm (green)
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