A prosection is the dissection of a cadaver (human or animal) or part of a cadaver by an experienced anatomist in order to demonstrate for students anatomic structure. In a dissection, students learn by doing; in a prosection, students learn by either observing a dissection being performed by an experienced anatomist or examining a specimen that has already been dissected by an experienced anatomist (etymology: Latin pro- "before" + sectio "a cutting")
A prosection may also refer to the dissected cadaver or cadaver part which is then reassembled and provided to students for review.
Read more about Prosection: Use of Prosections in Medicine