Which structures would you expect to find in the frog?

In a frog, you would expect to find structures such as smooth skin for respiration and moisture retention, long limbs adapted for jumping, and a specialized skeletal system that includes a fused pelvis for powerful hind leg movement. Additionally, frogs possess a complex circulatory system with a three-chambered heart, as well as a unique vocal sac in males used for calling during mating season. Their digestive system includes a short intestine suited for a carnivorous diet, primarily consisting of insects. Lastly, frogs have a well-developed nervous system with a large brain relative to body size, facilitating their quick reflexes and sensory processing.