In The Yellow Emperor's Canon of Internal Medicine, it states that the meridian system transports the blood, the chi and nutrition, communicating with the organs and systems of the body.
〈素問篇〉說：「血病身有痛者，治其經絡。」意思是經絡為人體中運行血液、生氣、營養等成分，溝通臟腑、器官的系統。