The cardiovascular system consists of blood vessels. Arteries carry oxygenated blood from the heart. Veins return used blood to the heart. The intricate capillary networks feed the body tissues directly. Arteries and veins are connected via the capillaries. The body uses various mechanisms to ensure tissues receive adequate oxygenation. It works effectively in all manner of situations. By very lightly holding reflex points, blood flow increases to specific organs. The blood flow also increases to muscles and glands. As part of the process, the related neuronal associations and acupuncture meridians are stimulated. Neurovascular reflexes are located mainly on the head and are held lightly in order to strengthen an unlocked muscle.