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CHAPTER 6 - NERVOUS TISSUE
Histology Guide
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MICROGRAPH

NAME
EM 338 Optic nerves
TISSUE
Optic Nerve
IMAGE SIZE
10,531 x 8,390 pixels
253 MB
FILE SIZES
73,082 KB (grayscale)
73,770 KB (color)
MAGNIFICATION
x 23,500
PIXEL SIZE
1.176 nm
SOURCE
Michael J. Cullen
Laboratory of Neuropathalogy and Neuroanatomical Sciences
National Institutes of Health
Bethesda, Maryland

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Robert L. Sorenson, Ph.D.

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EM 338 Optic Nerve

Nerve Fibers

Transmission electron micrograph (TEM) of a cross-section of an optic nerve. The optic nerves are bundles of more than one million nerve fibers that relay signals from the eyes to the brain to create visual images.

Oligodendrocytes and astrocytes are found among the non-myelinated and myelinated axons.

  • (green) - cell body and encloses a larger axon
    • Cross-sections of isolated dendrocyte processes myelinating other axons are seen
    • A single oligodendrocyte can myelinate more than one axon
  • Axons
    • (yellow) - enclosed by a myelin sheath
    • (orange)
  • (tan) - glial cells that support nerve cells
    • (purple) - type of intermediate filaments (glial fibrillary acidic protein; GFAP) that are specific for the cytoskeleton of astrocytes

Subcellular Structures

  • Nucleus (blue) / Nuclear Envelope (purple)
  • Golgi Apparatus (yellow)
  • Mitochondria (red)
  • Endoplasmic Reticulum (cyan)
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