Scrubbing and rubbing
For routine surgical hand preparation alcohol-based handrubs are superior to scrubs because they are equally effective but cause less skin irritation, are cheaper, and use less water.
Epithelium means "cover tissue" that covers the whole surface of the body and lines the surfaces of hollow organs (e.g. intestine, bladder, etc.) The epithelium is composed of tightly single or multi-layered cells.