cortices. 1  1a (1) : the outer or superficial part of an organ or bodily structure (such as the kidney, adrenal gland, or cerebellum or a bone); especially : cerebral cortex (2) : the proteinaceous usually pigmented layer of a hair below the cuticleb : the outer part of some organisms (such as paramecia)
If a toenail has completely fallen off, it can take up to 18 months for it to grow back. A toenail can take longer to grow back if the nail bed has permanent damage. In some cases, old nails do not completely fall off, and they act as a protective...
Re: how long does it take for toenails to grow. Jessica - I read an on-line article that said your toenails grow about 1/2 as fast as your fingernails. A fingernail will completely grow out in about 6-12 months while a big toenail will take 12-18 months. Fingernails grow 1mm every 10 days so a toenail averages 1/2mm in 10 days. I had to look this up awhile back because I injured my big toenail like David on April Fools Day (no joke)! Mine is about 1/2 grown in at this point.