血液从心室排涌到动脉里的推进力是很强烈的。此种张力如果直接达到毛细血管,必将所有的毛细血管破坏。在动物身上没产生这种严重的危胁,是由于大中小动脉各部分的组织不同而在物理生理上产生不同的功能之故。大动脉直接接受由心喷射出来的血液,同时它又承担容纳心脏喷射出的血液和继之将它向前驱逐以准备接受下次由心脏喷 The propulsion of blood from the ventricle to the arteries is very strong. If such tension directly to the capillaries, will destroy all the capillaries. This serious threat to animals does not occur because of the different physical and physiological functions of different organs of the middle, small and large arteries. The aorta receives the blood ejected directly from the heart, and at the same time it takes over the blood ejected from the heart and then expels it in preparation for the next time it is ejected by the heart