营养物质和氧经由血流供应身体各种不同的器官,无用的代谢产物则从器官转运出来。如果营养物质的需要量突然发生重大改变,器官血流便必须进行相应的调整。这种调整通过神经、体液、局部因素和结构因素之间的复杂的相互作用而完成。人们知道,象高血压和充血性心力衰竭这类疾病以 Nutrients and oxygen supply the body’s various organs via bloodstream, and unwanted metabolites are transported from the organ. If there is a sudden major change in the nutrient requirement, the blood flow to the organ must be adjusted accordingly. This adjustment is accomplished through complex interactions between nerves, body fluids, local and structural factors. People know that such diseases as hypertension and congestive heart failure