The genitals
Tadpoles and frogs differ primarily in their physical form and life stage. Tadpoles are aquatic, have a streamlined body, a long tail, and breathe through gills, while frogs are terrestrial, possess limbs for jumping, and breathe through lungs. Additionally, tadpoles primarily feed on algae, whereas adult frogs are carnivorous and consume insects and other small animals. This transformation from tadpole to frog is part of their life cycle, known as metamorphosis.
The anus.
The mouth.
Frogs were not invented,. They are a part of nature like any other animal.
Their lungs and diaphragm
Yes. Frogs can breathe via lungs or skin. When above water, they rely mostly on lungs, aided by skin. When underwater, frogs "breathe" solely through their skin. (To be more accurate frogs perform gas exchange with their skin, as breathing pertains to lungs.)
Breathe is a verb; as in, "I need to breathe, I'm suffocating." Breath, on the other hand is a noun.
A muscle called the Diaphragm
A fish breaths through it's gills.
Frogs have four limbs, two hind legs and two forelegs.
You breathe in through your nostrils or mouth, which allows air to enter your respiratory system and reach your lungs where oxygen is absorbed into the bloodstream.
The horse does have a frog on their hoof except it is not the real animal. It is a part of their body/hoof.