What happens when we get cut and bleed? How does skin scab over and heal? And why does skin scar? These two new vocabulary-filled TED-Eds from Sarthak Sinha get deep under our skin to give us a better understanding of how our bodies work to protect us.

Above: How a wound heals itself. Below: How do scars form?

Watch more videos about bodies of all kinds, human health, and our skin, including: Lupita Nyong’o Loves Her Skin and How the Sun Sees You: Revealing human skin in ultraviolet light.

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