The pericardium consists of two distinct sublayers: the sturdy outer fibrous pericardium and the inner serous pericardium.
心包由两个不同的亚层组成：坚固的外纤维心包和内浆液心包。
The pericardium consists of two distinct sublayers: the sturdy outer fibrous pericardium and the inner serous pericardium.
心包由两个不同的亚层组成：坚固的外纤维心包和内浆液心包。
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