In terms of Brodmann areas, the prefrontal cortex traditionally includes areas 8, 9, 10, 11, 44, 45, 46, and 47 (to complicate matters, not all of these areas are strictly granularâ44 is dysgranular, caudal 11 and orbital 47 are agranular).
A starfish's mouth is on the center of its bottom side. Its stomach  is directly behind the mouth after a short esophagus and extends a  bit down its five arms.
Smaller food is moved by the tube feet along the outer arms into the mouth located in the center on the underside of the starfish. Food is pushed by the esophagus into the stomach and digested by enzymes produced in the pyloric cecum. In the Red-Knobbed Starfish, the mouth is in actuality a sort of primary stomach.