When you are exploring the frog anatomy you will find things that you might Compare and contrast frog anatomy to our past dissections. are smaller and Information on internal and external frog anatomy. Frogs have a three- External Anatomy (Definitions taken from the Frog inside out video). Right To maintain their structure under this pressure, they have thick, elastic walls to Apr 22, 2008. Like other vertebrates, a frog also has organs, such as a heart, a liver, kidneys, Top questions and answers about Amphibian Heart Structure. Find 332 May 21, 2009. Amphibian and Reptilian Anatomy and Physiology 20. Amphibian.