Caption: Human fingernail surface. The structured keratin layers are dead keratinized epithelial cells produced by the mitotic division of epithelial cells in the nail bed. The dead cells are linked firmly together by keratin attachments forming a hard protective translucent layer. Nails grow at an average rate of 3 millimeters a month. It takes about 6 months for a fingernail to grow from base to tip. Deep transverse grooves that form across the nails often indicates illness or a deficiency. Keratin is a protein that is also found in skin and hair. A similar process occurs in the growth of a hair from its follicle.
Magnification*: x98
Type: SEM
Copyright 2009 Dennis Kunkel Microscopy, Inc.
Keywords: human,keratin,SEM,06.01.09,92715D,fingernail,fingernail surface,fingernails,human body,human fingernail,finger nail,keratinized cell,keratinized cells,epithelia,epithelial cell,epithelial cells,epithelium,finger nail surface,keratinized epithelial cell,keratinized epithelial cells,mitotic division,nail bed,nailbed,keratin epithelial cell,keratin epithelial cells,keratin protein,nail plate,onychomycosis,onychodystrophy,onychogryphosis,onycholysis