Which protects nerve endings at the ends of fingers and toes? joints
hair
nails
muscle

Nails

Nails protects nerve endings at the ends of fingers and toes Nails are the special thin, plates at the ends of fingers and toes of humans and some other animals. Nails are part of the accessory structures that constitute the integumentary system. Nails are made up of densely packed dead keratinocytes and are produced on the nail bed.

Explanation:

increased stability in the completion of fluorine's outer shell.