名词
中文翻译：后壁心肌
同义词：
['posterior myocardium', 'posterior ventricular wall']
例句：
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1. The posterior papillary muscle is responsible for the heart's contraction and relaxation.
后壁心肌负责心脏的收缩和舒张。
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2.During surgery, the posterior papillary muscle is carefully dissected to avoid damaging it.
在手术过程中，小心地分离后壁心肌以避免损伤它。
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3. The posterior papillary muscle plays a crucial role in maintaining the proper functioning of the heart.
后壁心肌在保持心脏正常功能方面起着至关重要的作用。