Nitric oxide is crucial to the cardiovascular system because it signals the inner walls of blood vessels to relax, which facilitates the flow of blood through the heart and circulatory system.
一氧化氮在心血管系统中起着重要的作用，因为它介导血管内皮舒张，这可以缓解血液流经心脏和循环系统的压力。
Body temperature is regulated by blood flow through the skin - vessels dilating and constricting with changing external conditions.
血液流过皮肤来调节体温-血管根据外部条件的变化扩张和收缩。
In contrast to diabetes, exercise and good diet bring about faster blood flow through blood vessels.
与糖尿病相反，运动以及良好的饮食习惯可加速血流。
The endothelium is surrounded by the media—a layer of smooth muscle cells that can constrict the blood vessels restrict blood flow or dilate it to let more blood through.
内皮细胞被一层平滑肌细胞包围，它可以压缩血管限制血液流动或者扩大血管让更多的血液流过。
The endothelium is surrounded by the media—a layer of smooth muscle cells that can constrict the blood vessels restrict blood flow or dilate it to let more blood through.
内皮细胞被一层平滑肌细胞包围，它可以压缩血管限制血液流动或者扩大血管让更多的血液流过。
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