| 1. | Figure 7 . thrombus in a vein ( arrows ) , identified by the absence of elastic fibers ( resorcin ? fuchsin elastic tissue stain , ? 125 ) . in contrast , a nearby artery contains internal elastic fibers ( arrowhead ) 图7 .血管缺乏弹性纤维,证明为静脉,并见静脉血栓(箭头) 。相反,附近的动脉存在弹性纤维。 |