The primitive pit is a depression in the center of the primitive node, connecting to the notochord. It consists of part of the primitive streak.
Famous quotes containing the words primitive and/or pit:
“It would be some advantage to live a primitive and frontier life, though in the midst of an outward civilization, if only to learn what are the gross necessaries of life and what methods have been taken to obtain them.”
—Henry David Thoreau (1817–1862)
“I know those little phrases that seem so innocuous and, once you let them in, pollute the whole of speech. Nothing is more real than nothing. They rise up out of the pit and know no rest until they drag you down into its dark.”
—Samuel Beckett (1906–1989)