2. Region Thoracic wall and cavity Superior vena cava● Internal thoracic artery o Left at Right phrenic nerve o Transve rdial sinus Pectoralis major● monary trunk 3rd rib Middle lobar bronchus o Left phrenic nerve Right lung, middle lobe Middle lobar bronchus Left lung, supe Mammary Long thoracic nerve ddes Inferior lobar arteries o Oblique fissure Right lu Pleural cavity inferior Serratus anterior●一 bronchus [B X Latissimus dorsi ● Left inferior Right inferior pulmonary vein e External intercostal muscle e ● Descending aorta Thoracic duct The thoracic cavity, surrounded by the thoracic wall, contains the lungs, pleura and pleural cavity and mediastinum2.Region Thoracic wall and cavity The thoracic wall consists of skin, fascia, nerves, vessels, muscles, and bones. The thoracic cavity, surrounded by the thoracic wall, contains the lungs, pleura and pleural cavity and mediastinum