A、<p><span style="font-family: 宋体; font-size: 14px; ">参与心肌电传导</span></p>
B、<p><span style="font-family: 宋体; font-size: 14px; ">在心包腔内起润滑作用</span></p>
C、<p><span style="font-family: 宋体; font-size: 14px; ">营养心包膜</span></p>
D、<p><span style="font-family: 宋体; font-size: 14px; ">体液免疫</span></p>
E、<p style="white-space: normal;"><span style="font-family: 宋体; font-size: 14px;">增强心肌收缩力</span></p><p><br/></p>