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在十七世纪,William Harvey氏的研究,已经确定了心脏的主要机能——啷筒机能。但是,在这个世纪内所进行的许多实验也反映出,在一定的情况下,心脏也有助于内分泌的机能活动。1921年,Otto Loewi刺激灌流的海龟离体心脏的交感神经,发现心跳加快并且收缩力也加强。此外,神经刺激也能使类交感能性物质向灌流液内释放。这样一来,Loewi发现,刺激交神经后,海龟心脏的灌
In the seventeenth century, William Harvey’s research has identified the main function of the heart, the bowel function. However, many experiments conducted in this century also reflect that under certain circumstances, the heart also contributes to endocrine and functional activities. In 1921, Otto Loewi stimulated the sympathetic nerves of isolated heart of perfusion turtles and found that the heartbeat was faster and the contractility was strengthened. In addition, nerve stimulation can also make the class of sympathetic substances released to the perfusion fluid. As a result, Loewi found that the turtles’ heart was infused after stimulating the nerves