👉 Papilionides are a group of small, flat-shaped structures that occur in the digestive tract. These structures include the pylorus (the opening of the stomach), which is an important part of the alimentary canal. Papillae, or papillary structures, are found in this area and play a crucial role in digestion. Papillae are made up of tiny cells called papillae cells that line the walls of the pylorus. These cells have a small, flat surface that
