The circulatory system consists of the pulmonary and systemic circuits. The pulmonary circuit oxygenates blood in the lungs and the systemic circuit distributes oxygenated blood to the entire body. Blood pressure can be measured non-invasively via cuff or invasively via catheter. Central venous pressure and jugular venous pressure provide information about right heart function. The fetal and portal circulatory systems have unique adaptations to support development and digestion.