Abstract
The fine structure of undifferentiated interphase and mitotic cells of the 10-day mouse embryo neural tube has been described. Cytoplasmic microtubules (270 Å) were seen in the interphase cells, often connected to the Golgi vesicles near the nucleus and ending in an apical vesicle or parabasal body adjacent to the central canal. Similar microtubules forming spindle fibers and connected with chromosomes were prominent in mitotic cells. The possible role of cytoplasmic microtubules in maintenance of cell shape, nuclear migration, and cerebrospinal fluid secretion is discussed.
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