What is the cell in human body can be seen from outside?

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

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

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

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

* øjne: 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!