How does the position of the stocmach primordium change during later development? a. it runs in the long axis of the embryo, as a fusiform dilatation of the foregut b. later it rotates clockwise causing its left side to face anteriorly, and its right side posteriorly c. during the rotation, the original posterior wall of the stomach grows faster than the ant. portion and this results in the formation of the lesser and greater curvatures, respectively. d. the cephalic and caudal ends of the stomach are originally located in the midline, but during further growth the caudal part moves to the left and upward and the cephalic portion to the left and slightly upward