Human fingernails are not poison, but they carry a great variety of bacteria beneath them, and scratches can cause serious infections.
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
Nails
yes
I believe they grow faster.
Yes, it is like our finger nails
Bathe regularly.