The blood vessels are in general dilated, although the cornary and pulmonary circulation may show the opposite response. 血管一般是扩张的,但冠状循环和肺循环的血管则可出现收缩。
Fluid is transferred cephalad in microgravity and simulated microgravity,and the pulmonary circulation is the first to be affected. 微重力或模拟微重力时体液头向转移,首先波及肺循环。