Healthy fingernails come from a healthy diet and exercise. If they are discolored they may have fungus or bacteria causing the change in color.
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 chewing your fingernails, also by ripping and scratching your nails on rough objects like sandpaper. You also have to remember to use a nailfiller very good.
no
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
diptheria
Yes, they can. People who suffer from eating disorders tend to lack vital and essentail nutrients in their diet from lack of eating properly. These missing nutrients cannot help keep nails healthy, so they can discolor, become brittle, or fall out.
Finger nails (and toe nails) are made of keratin.
For finger nails :no,the other nails are iron , copper, etc but not plastic
Nails