How is all human skin alike and different?

The skin is the body's largest organ, but not all skin is the same. Skin structure, and the way it behaves, differs slightly according to where it is on our bodies. ... Some areas of the body, for example the hands and face, are more exposed to external forces such as the sun and cleaning products than other parts.

Explanation:

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b) the inside picture would look at a very high temperature in a very low ph