The difference between meridians and blood vessels: 1. Meridians are a Chinese medical concept, and are closely related to many Chinese medicine and acupuncture, and can achieve certain clinical results. 2, blood vessels are visible and tangible pipeline system, consisting of arteries and veins and capillaries between the arteries and veins, the main role of blood vessels is to be the pathway for blood to run, and through the blood to transport oxygen and nutrients to various tissues and organs of the body, so that after oxygen metabolism, carbon dioxide and metabolic products are returned to the body through the venous system. The main function of blood vessels is to be the pathway for blood to run, and to transport oxygen and nutrients to all tissues and organs of the body through blood, so that carbon dioxide and metabolic products after oxygen metabolism can be returned to the heart through the venous system to complete blood circulation.