Primitive Pit

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 primitive wood is always and everywhere damp and mossy, so that I traveled constantly with the impression that I was in a swamp; and only when it was remarked that this or that tract, judging from the quality of the timber on it, would make a profitable clearing, was I reminded, that if the sun were let in it would make a dry field, like the few I had seen, at once.
    Henry David Thoreau (1817–1862)

    Let us put an end to self-inflicted wounds. Let us remember that our national unity is a most priceless asset. Let us deny our adversaries the satisfaction of using Vietnam to pit Americans against Americans.
    Gerald R. Ford (b. 1913)