The Molecular Genetics and Cellular Mechanisms Underlying Pulmonary Arterial Hypertension
Figure 1
Development of the circulatory system. Systemic and pulmonary circulation in the (a) foetus, (b) neonate, and (c) adult. The arrows refer to the direction of blood flow through the anatomical compartments, depicted by the labelled rectangular boxes. The oval shapes labelled FO and DA refer to the foramen ovale and ductus arteriosus, respectively.
