Try the Poem - by Thomas Hood called "Mary’s Ghost" singable to various Irish tunes - pick your own - It's about body snatching and anatomy.

The last stanza is:

The day does dawn, the cock does crow; It's time for us to part.
You'll always be my lover Though some doctor has my heart.
You need not go weep on my grave And think that there I be.
There ain't a single atom left Of my anatomy.

Hood wrote another body-snatching poem called "Jack Hall" and Robert Southey wrote the wonderful "The Surgeon’s Warning" - perhaps not singable but great stuff.