It covers and protects everything inside your body. Without skin, people's muscles, bones, and organs would be hanging out all over the place. Skin holds everything together.
Your skin is the organ that comes into contact with the rest of the world. It holds body fluids in, preventing dehydration (dee-hahy-DREY-shun), and keeps harmful microbes (MYE-krobs) out—without it, we would get infections. Your skin is full of nerve endings that help you feel things like heat, cold, and pain."
"Your skin is very important for a variety of reasons.
Your skin protects you, at the same time it’s holding things in place. The thinnest skin on your body forms your eyelids, yet these tiny bits of skin do an amazing job of protecting your eyes. The thickest skin on your body makes up the soles of your feet. Your foot muscles would probably be really sore if they didn’t have your skin to protect them when you run around barefoot during the summer! Your skin also helps to keep your body at just the right temperature, especially when it's hot or cold."