Guide students through dissection with this representation of the common frog. Designed in three-dimensions, the models show a dorsal view and all internal viscera. Study the circulatory, urinary system, and more in detail. The basic version shows basic structures related to the circulatory and urinary systems. The larger, open back version shows greater detail additional organs, and also includes a cut away region on the dorsal side exposing the brain, spine and nerves.