mesocardium

例句：

1. 1. The heart's mesocardium is responsible for the movement of bloodthrough the body.
   心脏的中层心肌负责血液通过身体。
2. 2. The mesocardium playsa crucial role in maintaining the proper functioning of the heart.
   中层心肌在保持心脏正常功能中起着至关重要的作用。
3. 3. During surgery, the surgeon carefully dissects themesocardium to avoid damaging thevital organs.
   在手术过程中，外科医生小心地分离中层心肌以避免损伤重要器官。