The fingernails that grow on the end of your fingers are biodegradable, since they are made of keratin. Depending upon conditions, the breakdown could take a while.
They are.
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