Cells

[Blenton]

What is the mechanism by which they adhere to each other, and what stops them from sticking together when say you put your hands together?

[granpa]

I dont know but you might want to look up collagen and elastin.

[Andy Resnick]

Cells have many different types of junctions- epithelial cells have tight junctions (mediated by occludins and claudins), gap junctions (connexins), cell-cell adhesion molecules (cadherins), and attachment to the basal lamina via integrins. All junctions are highly regulated.

Your outer layer of skin consists of dead cells that have been keratinized.