why do we have toenails

Humans have toenails primarily for protection. Toenails act as shields that protect the skin, nerves, and small bones of the toes from injuries, such as stubbing or impacts. They help prevent damage that could hinder walking or running, which are essential for survival. Toenails also provide structural support to the tips of toes, helping to distribute pressure and maintain balance when walking or running. Additionally, they enhance the sensitivity of the toes, improving the body's ability to sense terrain and movement. While toenails are evolutionary remnants of claws used by our tree-climbing ancestors, they still serve useful functions today, even if less critical than before. People can live without toenails, but their absence can make toes more vulnerable to injury and discomfort. Overall, toenails are protective, supportive, and sensory structures that have persisted through human evolution.