How are frogs and humans digestive system similar and different?

Frogs are predators, eating small reptiles, mammals, insects and fish. Their method of obtaining food is generally to wait until the prey gets near than pounce and swallow whole. As such most of the initial digestion takes place within the stomach where digestive enzymes break down the prey. The small intestine is relatively short as digestion in the frog is the absorption of nutrients aided by secretions from the gall bladder (pronounced) and return circulation from the intestine to the livers (very large relative to the whole). The large intestine is very large and sack like. Very little in the way of recovery of water is needed as frogs are amphibians and water loss is generally not a problem . Frogs expel the contents of the all at once. Dependent on the abundance of food supply the transit time though the system can be very short and the food expelled can be only partially digested.