图-31 左心房与左心室 The left atrium and left ventricle 11 左心房 left atrium 12 左心室 left ventricle 13 肺动脉右支 right branch of pulmonary artery 14 肺静脉 pulmonary vein 15 前腔静脉 precavalvein 16 肺动脉左支 left branch of pulmonary art 7tery 17 后腔静脉 postcaval vein 18 心中静脉 middle cardiac vein 19 头臂动脉 brachiocephalic artery 20 主动脉弓 aortic arch 21 乳头肌 papillary muscles 22 左颈总动脉 left common carotid artery 23 左锁骨下动脉 left subclavian artery 24 右前腔静脉 right precaval vein 25 心外膜 extracardium