compact myelin
The portion of the myelin sheath in which layers of cell membrane are tightly juxtaposed, completely excluding cytoplasm. The juxtaposed cytoplasmic surfaces form the major dense line, while the juxtaposed extracellular surfaces form the interperiod line visible in electron micrographs.
GO:0110165
cellular anatomical structure
is_a
GO:0043209
myelin sheath
part_of
Schwann cell compact myelin
narrow
oligodendrocyte compact myelin
narrow