The stomach is one of the internal organs. ✬

I'm afraid I have internal bleeding. ✬

Tom copied all the files on his internal hard disk to an external hard disk. ✬

This is for internal use. ✬

Fortunately, Tom had no internal injuries. ✬

Tom died of internal injuries. ✬

I'm afraid that I have internal bleeding. ✬

Tom is explaining the way an internal-combustion engine works. ✬

Tom explained how an internal-combustion engine worked. ✬