The above image shows another ventral view of a dissected frog with the liver and gall bladder removed to reveal the underlying organs. Structures belonging to the digestive system that can be seen include the stomach (1), small intestine (2) and large intestine (3). Other labeled structures that can be seen include the right and left lungs (4), ventricle (5), left atrium (6) and right atrium (7) of the heart and the spleen (8), which is part of the circulatory system.