Hindlimbs are the back legs of an animal, primarily used for locomotion and support. In many species, including mammals, birds, and reptiles, hindlimbs play a crucial role in movement, allowing for walking, running, jumping, or swimming. They are typically stronger and more muscular than forelimbs, enabling animals to perform various physical activities. In humans, the hindlimbs are represented by the legs, which consist of the thigh, knee, lower leg, and foot. The structure of human hindlimbs is adapted for bipedalism, allowing for upright walking. Other animals, such as dogs and cats, have hindlimbs that are adapted for different types of movement, reflecting their ecological niches.