What are 5 organ systems visable in a frog?

In a frog, five visible organ systems include the circulatory system, respiratory system, digestive system, excretory system, and nervous system. The circulatory system consists of the heart and blood vessels, while the respiratory system features lungs and skin for gas exchange. The digestive system includes the stomach and intestines, the excretory system comprises the kidneys and bladder, and the nervous system is represented by the brain and spinal cord. These systems work together to maintain the frog's overall health and functionality.