1 Prophylaxis against dexamethasone associated ulceration: 0.031-1.25 mg/kg/hr during dexamethasone therapy to maintain gastric pH >4.  Prophylaxis against stress ulceration: 2 mg/kg q12hr or 1.5 mg/kg IV q8hr; alternativley, 2 mg/kg over 10 min, followed by continuous infusion of 0.083 mg/kg/hr.
The heart is a muscular pump that pushes blood through blood vessels around the body. Essential to life, the heart beats continuously, pumping the equivalent of more than 14,000 litres of blood every day. Blood vessels form the living system of tubes that carry blood both to and from the heart.
Blood vessels. The blood vessels of the body (arteries, capillaries, and veins) make up a closed system of tubes that carry blood from the heart to tissues all over the body and then back to the heart. Arteries carry blood away from the heart, while veins carry blood toward the heart.