What does the bulbous cordis become in the adult heart?

The bulbous cordis is a structure during embryonic development that contributes to the formation of the heart. As the heart develops and undergoes morphogenetic changes, the bulbous cordis gives rise to the outflow tracts of the ventricles, specifically the right ventricle and parts of the aorta and pulmonary trunk.

In the adult heart, the portion of the bulbous cordis that develops into the right ventricle is particularly important, as this structure is responsible for pumping deoxygenated blood to the lungs for oxygenation. The transition from the bulbous cordis to the right ventricle signifies significant development and specialization of cardiac structures during fetal development.

Overall, recognizing the embryological origins of cardiac structures helps in understanding congenital heart defects and the functional roles of each part of the heart in both fetal and adult circulation.