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Your epidermis is the top layer of the skin that you can see and touch.The epidermis: o Acts as a protective barrier: The epidermis keeps bacteria and germs from entering your body and bloodstream and causing infections.Provides skin color: The epidermis contains melanin, the pigment that gives skin its color.Keratin, a protein inside skin cells, makes up the skin cells and, along with other proteins, sticks together to form this layer.They help fight off germs and infections.

Your epidermis is the top layer of the skin that you can see and touch. Keratin, a protein inside skin cells, makes up the skin cells and, along with other proteins, sticks together to form this layer. The epidermis:
• Acts as a protective barrier: The epidermis keeps bacteria and germs from entering your body and bloodstream and causing infections. It also protects against rain, sun and other elements.
• Makes new skin: The epidermis continually makes new skin cells. These new cells replace the approximately 40,000 old skin cells that your body sheds every day. You have new skin every 30 days.
• Protects your body: Langerhans cells in the epidermis are part of the body's immune system. They help fight off germs and infections.
Provides skin color: The epidermis contains melanin, the pigment that gives skin its color. The amount of melanin you have determines the color of your skin, hair and eyes. People who make more melanin have darker skin and may tan more quickly.