What is the instrument that can see the tissues and organs of the human body?

The microscope is used to see at the level of tissue cells, and the "naked eye" is used to see the form of organs.

It is not possible for a single instrument to see both microscopic and macroscopic forms.

And again, any instrument that "sees" through light can't possibly cause harm to people !!!!!!!! Just as you "see" through a glass window !!!!