Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Method of determining cell density in the regions of the presumptive MEPs and SEZs. (For details see Text). (a) Diagrammatic representation of transversely sectioned neural tube (shaded), with a pale lumen and bounded by the presumptive glia limitans (inner ellipse). (b) Transverse section of a rat E11 neural tube prior to rootlet emergence. The outer ellipse is shown, 80 µm above the neural tube surface.
