Limbs are the parts of our body that help us move and interact with the world around us. Humans have four limbs: two arms and two legs. Our arms allow us to reach, grab, and lift things, while our legs help us walk, run, and jump. Each limb has joints, like elbows and knees, that make movement easier and more flexible. In animals, limbs can vary greatly. For example, dogs have four legs that help them run fast, while birds have wings that allow them to fly. Even octopuses have limbs, but they are called tentacles, which they use to explore and catch food. Limbs are essential for mobility and survival in many species.