In the Josiah Charles Trent History of Medicine Room at the Rubenstein Library, Duke radiology research fellow Fides Schwartz unrolls a little hand-sized puff of bubble wrap and lays out on the table all the pieces of a neat, slightly translucent white medical manikin, about six inches tall. The body of a woman: She’s pregnant, and her midsection lifts off, revealing removable heart, lungs, baby. “You see?” Schwartz asks. “Actually it does all fit together.”