Warning sings your body’s biggest organ is trying to tell you!

Our skin on our bodies is made from three layers that are working together for a complete package. The most outer layer,also known as epidermis, is the known bruiser of the three, and also acts as a waterproof barrier for our internal organs and the world. The dermis—is under the epidermis—and is also known as the brain,and is holding the protective structures of the skin.

“The dermis is filled with collagen, and it gives our skin its structure, and also contains blood vessels, hair follicles, sweat glands, oil glands and last nerve endings. And the last layer of the three layers is the layer that stores fat for the skin.

Everyone knows the skin cools us down by sweating, which increases the amount of body heat we lose through evaporation. But there are other ways the skin keeps us at a pleasant temperature. “When we’re hot, capillaries—which are tiny blood vessels in the skin—dilate, so blood flows to the surface of our skin, where it’s cooled down by the outside air,” Chipps explains. “This now-cool blood then flows through the rest of the body, bringing down our internal temperature.”

It Helps Prevent Cancer

Several types of cancer—including colon, breast and prostate cancer—have recently been associated with vitamin D deficiency, which is something your skin can help with: The skin produces vitamin D when it’s exposed to sunlight. This doesn’t mean you should hang out at the beach all day long without applying sunscreen, of course. You only need to expose your skin for around half the time it would normally take to start to burn to produce more than enough vitamin D for one day.