internal organ
viscus

It can also be used to look at other internal organs.

I don't have internal organs in any sense you'd understand.

So does this mean that our system of internal organs is perfect?

How much damage does it take, before his internal organs give up and break down?

He was just lifting the internal organs out of the body.

Not if he wanted to keep all of his internal organs intact.

When they stood directly in front of a bright light, I could see their internal organs.

There is also a third impact between the internal organs and the frame of the body.

The internal organs were too far gone in decay to be much use.

They don't even seem to have the same kind of internal organs as the humans and animals.