Learning anatomy/Epidermis

Anatomy
The parts of the epidermis are:
 * Stratum basale
 * Stratum spinosum
 * Stratum granulosum
 * Stratum lucidum
 * Stratum corneum

Function
The epidermis prevents microbes from entering the body. The epidermis is also waterproof, preventing the ingress of liquids which would otherwise wreck havoc on the chemistry body. After all, how would you wash your hands if they were not waterproof?