Page 358 - Atlas of Histology with Functional Correlations

FIGURE 9.17 ■ Oligodendrocytes of the brain. Stain: silver impregnation (Cajal
method). High magnification.

FIGURE 9.18 | Ultrastructure of CNS

Oligodendrocyte with Myelinated Axons

This transmission electron micrograph illustrates internal morphology of the
oligodendrocyte (2), the myelin-producing cell of the CNS. The cytoplasm
exhibits a well-developed granular endoplasmic reticulum (3, 5), a Golgi
apparatus (6), and numerous free ribosomes around the organelles. Numerous

myelinated axons (1, 4, 8), cut in cross and longitudinal sections, are
surrounded with myelin sheaths (7) that are associated with the cytoplasm of the
oligodendrocyte. Located in the myelinated axons (1, 4) are oval, dark-staining
mitochondria (4) and numerous neurofilaments (8).

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