When the organ perfusion pressure changes, the arteriole resistance also change to keep the organ blood flow at a constant level, which is called the autoregulation of the blood flow.

• 当器官灌注压发生变化时，该器官的微动脉阻力也发生改变，使器官的血流量保持相对恒定的现象称为血流量的自身调节。