Page 381 - Atlas of Histology with Functional Correlations

FIGURE 9.26 ■ Sciatic nerve (transverse section). Stain: hematoxylin and

eosin. High magnification (oil immersion).

FIGURE 9.27 | Peripheral Nerve: Nodes of

Ranvier and Axons

A medium-magnification photomicrograph of a peripheral nerve sectioned in a
longitudinal plane is shown. The myelin sheaths that surround the axons (2, 8)
have been lost or washed out in this preparation, and only myelin spaces (7)

with protein network are seen. A centrally located axon (2, 8) is seen in some of
the nerve fibers that exhibited myelin sheaths. At regular intervals along the
axon are indentations or in the myelin sheaths. These represent the nodes of
Ranvier (1, 9). These sites indicate the edges of two different myelin sheaths

that enclose the axon. A possible Schwann cell nucleus (3) is seen with one of
the axons (2, 8) and a thin, blue connective tissue layer endoneurium (6) around
some of the axons (2, 8). Outside of the axons (2, 8) are capillary (4) with blood
cells and fibrocytes (5) of the connective tissue.

380