The _________ is a thin, smooth tissue that makes up the lining of the chambers and valves of the heart.
A、pericardium;
B、endocardium;
C、epicardium;
D、myocardium
发布时间:2025-08-07 04:30:47
A、pericardium;
B、endocardium;
C、epicardium;
D、myocardium