The top layer of skin is called the epidermis. It's the outermost layer and acts as the first barrier of protection against the environment. The epidermis is made up of several layers of cells, with the outermost layer being composed of dead cells that are constantly being shed and replaced by new cells from below.
The epidermis is responsible for several important functions, including:
- Protection: It shields the body from harmful UV rays, bacteria, and other environmental factors.
- Regulation of water loss: The epidermis helps to prevent excessive water loss from the body.
- Sensory perception: It contains nerve endings that allow us to feel touch, pressure, temperature, and pain.
- Pigmentation: The epidermis contains cells called melanocytes that produce melanin, which gives our skin its color and protects it from UV damage.
The epidermis is the most superficial layer of the skin and provides the first barrier of protection from the invasion of substances into the body.
