The area of the blastoderm on either side of, and immediately cephalic to, the primitive streak where the component cell layers have become thickened.
What’s The Area Between Your Eyebrows Called?People rarely take the time to notice, much less appreciate, their bodies. What vastly under-recognized parts of the body are there?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.