| Slide 17 |
Fingernail. Colored scanning electron micrograph (SEM) of a delaminated section
of fingernail. The flattened structures are dead keratinized epithelial cells
produced by the mitotic epithelium of the nailbed. The dead cells are linked
firmly together by keratin attachments forming a hard protective layer. It
takes about six months for a fingernail to grow from base to tip. A similar
process occurs in the growth of a hair from its follicle. Magnification: x315
at 6x7cm, x220 at 6x4.5cm size. x740 at 8x6inch size. x395 at 10x7cm master
size
Credit: Andrew Syred / Photo Researchers, Inc. |
