Septation of the ventricles and outflow tract

• function muscular interventricular septum → partially sepparates the ventricles
• The ventricles communicate through the  interventricular foramen
• The outflow tract is divided by the formation of a pair of conotruncal swellings or ridges
• The conotruncal swellings fuse to form the conotruncal septum that separates the future ascending aorta from the future pulmonary artery.