The prochordal plate marks the site of the future: (A) Umbilical cord, (B) Hea, (C) Mouth, (D) Anus
Answer is C. The prochordal plate is a circular, midline thickening of hypoblast cells that are firmly attached to the overlying epiblast cells. The plate will eventually develop into a membrane called the Buccopharyngeal membrane at the site of the future mouth.