Physiological terms. Blood refers to blood and blood vessels and the movement of blood in blood vessels. The physiological function of this system, presided over by the heart, is the driving force of blood circulation. Deficiency and pathological changes of heart qi and blood can affect the operation of blood vessels; The profit and loss of blood also directly affects the function of the heart. Su Wen Wu Zang Dai: "Blood belongs to the heart." Su Wenwei said: "The heart governs the blood of the body."
Heart governs blood vessels, which means that heart-qi promotes and regulates blood vessels to circulate along the veins and flow all over the body, giving play to the role of nutrition and moistening. Heart governing blood vessels includes two aspects: heart governing blood and main pulse. Heart governs blood: refers to the whole body's blood transported to the whole body by the beating of the heart, and the heart is the driving force of blood operation.