Which of the following pressures must remain negative to prevent lung collapse?
a) atmospheric pressure
b) intrapleural pressure
c) intrapulmonary pressure
d) transpulmonary pressure

Choose a topic from the reconstruction era listed below. research your topic. write a 300 word report on your findings! (one topic) 1 the conditions in the south during reconstruction 2 lincoln’s assassination 3 the freedmen’s bureau 4 the impeachment of president johnson