Skin, hair and nails

The skin acts as both the body’s shell and shield as well as a sensory organ. But what is it made up of? What is the purpose of hair and how do nails grow?

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    Structure of the nails

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    How does skin work?

    Our skin is our heaviest and largest organ, making up about one seventh of our body weight: Depending on your height and body mass, it weighs between...

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