By dissecting a frog, one can observe the many systems that allow a frog to function like many other organisms. The systems analyzed by dissection were the epidermis, muscles, digestive, urogential, circulatory and respiratory systems. All systems, including the skeletal and nervous system, have been compared to rudimentary and advanced organisms up to the frog. The life cycle and taxonomy of a frog were also studied during this laboratory. Through the dissection of a frog, an individual can expand their knowledge of multiple body systems in organisms like their own. The systems observed from the dissected frog were compared to those of a fish and a human. The first system analyzed was the epidermis of a frog, used for respiratory functions via capillaries, temperature regulation and protection of the body against pathogens. In humans, the epidermis layer is primarily used to protect the internal body from pathogens and to regulate temperature via the sebaceous glands. Fish skins are covered in layers of mucus and scales that serve for insulation and protection. The main purpose of the skin functions of these three organisms is insulation and protection through a layer of mucus or oil glands, but a frog also has the ability to breathe through the skin by osmosis. Frog lungs are used for respiration, but the main respiratory function is in the skin. Frogs use their lungs primarily for buoyancy when swimming. To breathe through the lungs, a frog inhales through the nasal cavity and dilates its throat which acts like a diaphragm since it does not have one. Humans have a diaphragm that allows them to inhale as much oxygen as possible. A human's lungs contain more bronchioles and alveoli for complex gases exc...... middle of paper ...... to develop legs, teeth and skin. Within two months, the tadpoles turn into frogs, long-tailed frogs, and start eating insects, not plants. In four months, the frog is an adult, capable of breathing air, walking on land without a tail and becoming carnivorous. For the rest of its life, the frog will spend fall and winter hibernating while mating and eating in spring and summer, repeating the life cycle. By performing a dissection of a frog, one can see that there are similarities and differences between frog, fish and human. The epidermis, digestive, circulatory and respiratory organs perform similar functions while the skeletal, muscular and joint systems, mentioned previously, meet the specific needs of these organisms. Taxonomy revealed the life cycle of a frog and concluded the rudimentary and complex functional similarities of fish, frog and man..