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The truncus arteriosus carries blood out of the heart into the aortic sac and subsequently into the aortic arch vessels. The conus cordis is a major contributor to the right ventricle.

                     Species: Mouse 
                     Day Gestation: 9 
             Approx. Human Age: 27 days 
                                   View: Transverse Cut
           Heart Chambers & Outflow Tract
                                     19 of 42