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)
“the hind
stepped down
into the pit of
the empty
flowerpot”
—William Carlos Williams (1883–1963)