(1) Another unexplored aspect of morphology involves septal microstructure.(2) Known as septal defects, the holes can typically be patched up with surgery.(3) The pleurocoels do not invade the parapophyses and they lack septal partitions.(4) He had corrective surgery for the atrioventricular septal defect at 3 years of age.(5) The endocardial cushions form the lower atrial septum, the upper ventricular septum, the septal leaflet of the tricuspid valve and the anterior leaflet of the mitral valve.
