The skin is our largest organ. Here, we explain what it's made of, what it does, and how it does it. We also cover some common skin conditions.

Petechiae are small, round spots that appear on the skin. They’re typically about the size of a pinhead, can be red or purple in color, and are flat in the skin. They happen when capillaries ...

Ceramides play an important role in the structure and barrier function of the skin, such as preventing moisture loss and protecting against environmental damage.

"Age-related changes in skin structure and lymphatic system promote melanoma metastasis." ScienceDaily. ScienceDaily, 2 October 2018. <www.sciencedaily.com / releases / 2018 / 10 / 181002103040.htm>.