Pericardial membrane
Pericardial membranes were the three layers of the pericardium: fibrous pericardium, parietal pericardium and visceral pericardium.

In 2369, Julian Bashir recounted to an attractive Bajoran woman, how as a student he had remembered that the answer to a question in a Starfleet Medical exam was a pericardial membrane seconds before the examination ended. ()
Anatomy