You can't see individual cells from outside the human body. Even with the most powerful microscopes, cells are far too small to be visible with the naked eye.

However, you can see some structures made up of many cells, like:

* Hair: Each hair is made of a column of dead cells filled with keratin.

* Skin: The outermost layer of skin is made of dead cells.

* Nails: Similar to hair, nails are made of keratin.

* Eyes: The iris and pupil are visible structures made of cells.

So while you can't see individual cells, you can see the larger structures they form!