前毛细血管小动脉阻塞 precapillary arteriole occlusion
绒毛微动脉在顶部与绒毛微静脉有交通支，形成毛细血管前动静脉吻合。
There were connecting vessels between the villi arteriole and the villi venule at the tip of the villi, and they form a precapillary arteriovenous anastomosis.
分析小球前各段血管的压力降所占动脉总压降的比例得知：小叶间动脉占总压降的88％。 肾小球毛细血管和出球小动脉亦具有较大的压力降。
The results showed that 88% of the total pressure drop across vasculature from arcuate artery fo glomeruli occurs in the interlobular artery and diameter of preglomerular microvessels.
缺氧时肺动脉压显著升高，这可能是肺毛细血管前肌性小动脉收缩的结果。
Hypoxia produced a sustained increase in pulmonary arterial pressure (Ppa), the site of vasoconstriction was proximal to the lung capillaries.
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