How do forelimbs bend in frog?

In frogs, forelimbs bend primarily at the elbow joint, which allows for flexion and extension. The muscles surrounding the elbow, including the biceps and triceps, contract and relax to facilitate this movement. Additionally, the unique structure of their limb bones, including the radius and ulna, supports a range of motion that aids in activities like leaping, swimming, and climbing. This flexibility is essential for their adaptive behaviors in various environments.