The skin is a fascinating organ. But the average person know surprisingly little about it. Are you familiar with these facts?
1. Skin account for a massive 15% of your body weight. This isn’t surprising when you consider it can have an area of over 2 meters and is the largest organ in the body.
2. You loose around 1 million skin cells every day. That’s over 40,000 an hour, 700 a minute and 10 a second. But don’t worry. You have 1.6 trillion skin cells in total.
3. The thinnest skin on your body is just 0.02 mm thick. Can you guess where it is? Your eyelids! The thickest skin on your body is found on your feet. It’s around 1.5 mm thick.
4. Your skin is renewed every 28 days. This is for the typical middle-aged adult. When we were babies this number was much lower. It gradually increases as we get older.
5. Skin on our hands and feet wrinkles when wet to improve grip. This is said to be an evolutionary benefit. It helps us to be more sure-footed on slippery surfaces, and helped our ancestors pick up tools. Read more here.
6. There are up to 1,000,000,000,000 bacteria on your body right now. Comprising of around 1000 species. A lot of the time the bacteria is actually beneficial as it stimulates the immune system of the body.
7. The color of our skin comes from melanin. Melanocytes produce the melanin, the more that’s the produced, the darker the skin. A lack of melanocytes is also known as Albinism. Melanin has a lot to do with how laser hair removal works.
8. Goose bumps make us warmer. Goose bumps happen when muscles at the base of our hair contracts and pull the hair upwards. This muscle tension can keep us warm. In animals it also generates heat to trap air which creates insulation.
9. You have 3 main layers of skin. The first of these is the epidermis which is the outer most layer. Next is the dermis layer which contains connective tissue, follicles and sweat glands. Lastly there’s the hypodermis which is the thickest layer and stores fats. Most permanent skin conditions work on the dermis.
10. Every inch of skin contains 1,000 nerve endings. It also has 650 sweat glands, 20 blood vessels and 60,000 melanocytes (the stuff that produces melanin we mentioned on number 7). [source]