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:
“The most primitive places left with us are the swamps, where the spruce still grows shaggy with usnea.”
—Henry David Thoreau (1817–1862)
“A custom loathsome to the eye, hateful to the nose, harmful to the brain, dangerous to the lungs, and in the black, stinking fume thereof nearest resembling the horrible Stygian smoke of the pit that is bottomless.”
—James I of England, James VI of Scotland (1566–1625)