Collagen | Secrets of Skin
Collagen makes up 90% of the skin dermis. Professor Ben Garrod talks to a scientist studying collagen whose research has some ground-breaking applications.
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The body's complex repair system | The Human Body : The Secrets of Your Life Revealed
How our bodies respond and repair when we are injured.
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How the body keeps warm in cold environments | Inside the Human Body
Using state-of-the-art graphics, Michael Mosley shows what happens in our bodies when we get cold.