What is the term for the hardened keratin plate that covers the nail bed?

The hardened keratin plate that covers the nail bed is known as the nail plate. It is composed mainly of keratin, a fibrous protein that provides strength and protection. The nail plate grows from the nail matrix, which is located underneath the base of the nail, and it extends over the nail bed, providing both aesthetic appearance and functional protection for the fingertip.

The nail plate is a crucial component of the nail structure as it serves to shield the underlying tissues from injury and infection, while also playing a role in the overall look of the hands and feet. Its hard, protective nature is essential for the proper health and function of the nails.