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 lumberers rarely trouble themselves to put out their fires, such is the dampness of the primitive forest; and this is one cause, no doubt, of the frequent fires in Maine, of which we hear so much on smoky days in Massachusetts.”
—Henry David Thoreau (1817–1862)
“The pit of a theatre is the one place where the tears of virtuous and wicked men alike are mingled.”
—Denis Diderot (1713–1784)