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 pit and/or primitive:

    A tiger in a deep pit can be bullied by dogs.
    Chinese proverb.

    We have as yet had no adequate account of a primitive pine forest.
    Henry David Thoreau (1817–1862)