Microscopy o keratin filaments inside cells.

Keratin is a faimily o fibrous structural proteins. Keratin is the protein that pertects epithelial cells frae damage or stress that haes potential tae kill the cell. It is the key structural material makin up the ooter layer o human skin. It is the key structural component o hair an nails, an it provides the necessar strenth an teuchness for masticatory organs, sic as the tongue an the haurd palate.