In C. mydas, L. olivacea and E. imbricata, from the caudal portion of the esophagus, the stomach is curved to the left side
forming initially the cardiac region, then a large pouch, the fundic region, and finally ascending to the right, forming the
pyloric region. The stomach is J-shaped, with the characteristic of a bag with a dead end (Fig. 4). Internally, the mucosa of
the stomach is characterized by longitudinal folds. When the stomach is distended, the folds disappear, giving the impression
of being an organ without mucosal folds, as observed in some animals analyzed.