👉 Peridiolum, also known as the peridium or peridote, is a term used in anatomy to describe the outer layer of the skin. It's typically found on the outside surface of an organ such as the eye, nose, mouth, and ear. The peridiolum is composed primarily of keratin, a type of protein that gives the skin its rough texture. It acts like a barrier between the skin and the surrounding environment, providing protection from external elements, including dust