Forelimbs are the front limbs of vertebrates, including mammals, birds, reptiles, and amphibians. They serve various functions, such as locomotion, manipulation, and support. In humans, forelimbs are known as arms, which consist of the upper arm, forearm, wrist, and hand. Other animals, like birds, have forelimbs adapted as wings for flight. The structure of forelimbs varies significantly among species, reflecting their different lifestyles and environments. For example, whales have evolved forelimbs into flippers for swimming, while cats possess flexible forelimbs for climbing and hunting. This diversity illustrates how forelimbs adapt to meet the needs of each species.