Belongs to connective tissue.

Nails are flat, thyroid-like structures on the back of the fingers (toes) of humans and apes, and are connective tissues. It is a deformation of the claw, also known as flat claw, and its main component is keratin. Homology with the claw, the sole of the claw retracts, and the claw plate forms a rectangular sheet. It is the product of keratinization of the epidermis at the finger (toe) end and plays a role in protecting the finger (toe) end.

Fingernails, also called claw nails, are tight and solid keratinized layers located on the extended surfaces of the ends of fingers or toes. The main function of nails is to protect the soft nail bed underneath from damage during work and to help the fingers complete finer movements.