Interfaces in Object Oriented Programming Languages. An interface is a programming structure/syntax that allows the computer to enforce certain properties on an object (class). For example, say we have a car class and a scooter class and a truck class. Each of these three classes should have a start_engine() action.
The epidermis is the very outer layer of the skin that provides protection from bacteria (thanks to it's pH level), becoming overloaded with water (it's waterproof) and from heat loss. It has four of five distinct layers to achieve this.
1 Epidermis is the single exterior layer that protects the stems, leaves, flowers, and roots. 2  The outside surface of the epidermis tissue is usually covered with a waxy substance called cutin, which reduces water loss. 3  Parenchyma tissues are made of simple, thin-walled cells.