1. The document contains 12 multiple choice questions about human anatomy related to the thorax region. 2. The questions cover topics like the intercostal nerves and arteries, structures in the right atrium, features of the right ventricle, structures visible on an x-ray of the left mediastinal border, structures in the superior mediastinum, features of the aortic arch, the thoracic duct pathway and contents, parts of the pericardium, structures posterior to the heart, features of the right main bronchus, and parts of the pleura. 3. The questions test knowledge of anatomical structures and relationships within the thoracic region.