– where does skin in your body stop being skin? Is the roof of the mouth skin? The back of the throat? How does skin attach and transition to non-skin flesh?
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please see this interesting excerpt i found [here](https://www3.nd.edu/~jsapirst/textbook/chapter_29.html) when googling this to figure out the best way to explain it:
> The internal structures of the body are entirely covered by a continuous layer of epithelial tissue. The part of this layer which is in contact with the outside environment is called the skin; those parts of it that lie within the body (and are yet outside it) are the mucus membranes.
>This idea of a structure being both inside and outside may be confusing, and it may help to consider the body as a long doughnut, the skin and mucus membranes corresponding to the outside of the doughnut and the internal structures being encased between them. The part of the doughnut which is around the hole corresponds to the mucus membranes, the rest to the skin.
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