Deep vein thrombosis and pulmonary embolism - blood clots in the leg veins, which can dislodge and move to the heart and lungs.
深静脉血栓和肺栓塞——腿部静脉出现血块，它可移动至心脏和肺部。
2
Oxygen passes through the incredibly thin walls of the alveoli into the capillaries and is then carried back to the heart via the pulmonaryveins.
氧气穿过无数肺泡的薄壁进入毛细血管中，随后经肺静脉带到心脏。
3
Objective To observe the morphologic characteristics of myocardial sleeve in sheep~(, ) s pulmonaryveins to provide data for the model of ectopic atrial fibrillation.