The esophagus.
Yes any animals' stomach is an organ.
food
food...
It should be called the pancreas, as is the same organ in a human.
It regulates the exit of partially digested food from the stomach and is in the lower region of the stomach
A sphincter.
the small intestine
The Gullet
The pylorus is the lower area in the stomach in a frog. The function of the pylorus in a frog is to standardize the exit of food from the stomach.
The inside of a frog's stomach has hard ridges. These hard ridges help mix the food with the digestive fluids when the stomach muscles churn the contents. The shape of these hard ridges is actually the shape of frog's stomach.
The frog's stomach is sac-like, meaning that as food goes into it, it can stretch out more. This provides more digestive surface itself, but it is combined by the smooth muscles churning the food even further.
No, not in the normal process of digestion.