Who Sang The Anatomist? The Deadfly Ensemble

I wear a nose and goodness knows I'm smart.
I walk undersea, lunglessly.
I pretend to writhe and seethe.
I count every time I shout.
I waste away once per day.
I avoid the stars (and planes and cars).
I talk upside down.
Her evening gown is on the ground!
I instruct anatomy.