Which of the following is a function of the epidermis?

The epidermis, as the outermost layer of the skin, protects underlying tissues from abrasions, heat, microbes, and chemicals. It functions as a major component of the innate immune system (the “general” immune system that targets anything seen as “foreign”). It is avascular, so it does not contain blood vessels. Lipid-containing cells are found in the subcutaneous layer.