Why Do Humans Have Fingernails And Toenails?

The video explores the evolution and function of keratin-based structures like claws, talons, and nails. It discusses how these structures evolved from claws in early tetrapods to nails in primates, enhancing grip and sensitivity. The transition allowed primates to climb and use tools effectively. Human nails further evolved to aid in tool use, providing a firm grip and precision. Toenails protect toes from injuries and aid in balance.

What is the significance of keratin in the evolution of nails and claws?

Explain how toenails contribute to balance and spatial awareness.