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Skin Anatomy

Skin anatomy is often more complex than people think. Learn more about skin anatomy at HowStuffWorks.

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Calculating Your Skin Age

No matter how old you are, deep wrinkles on your face may tell a different story. How do you determine your skin age, and what are some of the factors that contribute to fine lines and dryness?


How Itches Work

Although everyone itches, the reasoning behind it has puzzled scientists for decades. They're also trying to figure out why scratching an itch relieves it — and feels so good. See more »

Do vegetarians have smellier sweat than omnivores?

Some people think of vegetarians as "stinky." But does that stereotype have any basis in fact, and is it due solely to their plant-based diets? See more »

How Sweat Works

Sweat is your body's way of cooling itself. Learn about eccrine and aprocrine sweat glands, how the body makes sweat, why we sweat and what factors affect sweating. See more »

How many skin cells do you shed every day?

What happens to dead skin cells when they fall off your body? Are you sure you want to know? If you're sure you want the answer to this question, get ready for some staggering numbers. See more »

5 Ways Your Skin Changes During Adolescence

Adolescence seems like the worst surprise ever -- where did all of this hair and these bumps come from? And why do I smell terrible? Don't despair -- we've laid out five ways skin changes during those years so you'll know what you're dealing with. See more »

How does your skin eliminate waste?

Your skin is your body's largest organ and protects you from the elements, but how does it protect itself from toxins? Believe it or not, you actually do most of the work. See more »

How does my skin anatomy change as I get older?

Aging skin is a fact of life. At some point in each of our lives, our smooth and supple exteriors become dry, wrinkled and saggy. And although much of aging is biologically inevitable, there are some things you can do to protect yourself from the ravages of time. See more »

How Your Skin Works

If senior superlatives were given to human organs, the heart would win "hardest working," while the lungs would garner "most athletic." But what would the skin be noted for? Our guess is "most underappreciated" -- not to mention "best dressed." See more »

Skin Grafts

If skin grafts seem painful to you, that's because they are. Skin grafts are patches on skin that are attached or sewn to open wounds to help them heal. They may be excruciating, but they save lives. See more »

Why does fake gold turn your skin green?

You saved up money for a special ring for your lady friend, but the one you buy leaves a green stain on her finger. Why in the world did it do that? See more »