Fingernails don't really hide anything; you can see the skin underneath them because they are transparent, unless you use fingernail polish.
Nails (and finger nails) have volume.
Finger nails are made of a protein called keratin.
No one invented finger nails.
Actually, finger nails contain protein (called "keratin").
By system, you mean category.. I'm not sure if you mean finger nails or like tool nails, so I'll give you both. Finger nails: Body parts Tool nails: Hardware
Finger nails (and toe nails) are made of keratin.
yes
yes
Nails
I believe they grow faster.
Yes, it is like our finger nails
Bathe regularly.