Arrowsmith by Sinclair Lewis

Martin was jumpy on his first day of dissecting. He could not look at the inhumanly stiff faces of the starveling gray men lying on the wooden tables. But they were so impersonal, these lost old men, that in two days he was, like the other medics, calling them "Billy" and "Ike" and "the Parson," and regarding them as he had regarded animals in biology. The dissecting room itself was impersonal: hard cement floor, walls of hard plaster between wire-glass windows. Martin detested the reek of formaldehyde; that and some dreadful subtle other odor seemed to cling about him outside the dissecting room; but he smoked cigarettes to forget it, and in a week he was exploring arteries with youthful and altogether unholy joy.

His dissecting partner was the Reverend Ira Hinkley, known to the class by a similar but different name.