skin, body, nails, hair, UV rays , sun protecting, melanin, heat, cold, dark, light, white,

 {Skin

Your skin is the organ that comes into contact with the rest of the world. And it is the largest part of our body. It holds body fluids in, preventing dehydration and keeps harmful microbes out without it, we would get infections. Your skin is full of nerve endings that help you feel things like heat, cold, and pain.

Upon UV exposure, melanin synthesis in melanocytes acts as a defensive measure for all skin cells. After enough melanin is produced, the melanin acts as a filter or shield against UV light.

ou can work and play outside without raising your skin cancer risk by protecting your skin from the sun. Most skin cancers are caused by too much exposure to ultraviolet (UV) light. UV rays are an invisible kind of radiation that comes from the sun, tanning beds, and sunlamps. UV rays can damage skin cells.

Your skin makes up about 15% of your total body weight. The average adult has nearly 21 square feet of skin that contains over 11 miles of blood vessels. A single square inch of skin has about 300 sweat glands. The thickest skin is found on your feet and the thinnest area of skin are your eyelids.