ANATOMY, URINARY TRACT. ANATOMY, URINARY TRACT Model of the internal anatomy of the trunk of an adult human body of indeterminate sex, anterior view. In the thorax, the heart (atria covered by the auricles (beige) and ventricles for coronary circulation) and the lungs (internal view showing vascularization and bronchial branching) are visible. The esophagus, (tan) visible in the thorax between the lungs, protrudes into the abdominal cavity, where the deep organs can be seen here thanks to th