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Unformatted text preview: rea will be seen around each axon. This
is the location of the myelin sheath, which due to its high lipid content is dissolved in this type of
preparation (Nerve Bundle 4). Only in specimens fixed in osmium tetroxide (OsO4 ) will the myelin be
preserved and, in this case, stained black (Nerve Bundle 5). The myelin sheath is also visible in teased
preparations. Here the gaps in the sheath, the Nodes of Ranvier, are easily observed (Teased Nerve). Many
of the nuclei seen within a nerve bundle are fibroblast nuclei. Their presence is needed to synthesize and
maintain the connective tissue wrappings. Other nuclei represent the Schwann Cells, a PNS glial cell
responsible for myelination of...
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This note was uploaded on 12/13/2012 for the course 146 322 taught by Professor Babiarz during the Spring '12 term at Rutgers.
- Spring '12