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:
“We have as yet had no adequate account of a primitive pine forest.”
—Henry David Thoreau (1817–1862)
“the hind
stepped down
into the pit of
the empty
flowerpot”
—William Carlos Williams (1883–1963)