A cross-section of a human skin showing the structure of the skin. The skin appears to be a reddish-brown color and has a rough texture. On the right side of the image there is a small amount of small white particles scattered across the surface. The particles are arranged in a radial pattern with some overlapping each other. On the left side there are two vertical bars one labeled "High pH" and the other labeled "Low pH". The high pH bar is on the top left corner while the low pH bar has a blue bar on the bottom right corner. The blue bar is slightly larger than the red bar indicating that the high pH is higher than the white bar. The white bar is smaller than the blue bar and is located in the center of the red line. The background is a light blue color and there are a few small white dots scattered throughout the image.

• Photograph

• Outreach and Education