General introduction to mediastinum Concept: all the tissues and organs between both mediastinal pleura Location: situated between both mediastinal pleura, sagittal, to the left and separate the pleural sac and lungs. ◆ boundaries: Anteriorly: sternum and costal cartilages; Posteriorly: thoracic column Both sides: mediastinal pleura; Superiorly: inlet of thorax. Inferiorly diaphragm Contents: organs(heart trachea esophagus large blood vessels and nerve and connective tissue etc 甲状腺 前纵隔 boundary of ples interor burder of lun Concept: all the tissues and organs between both mediastinal pleura  Location: situated between both mediastinal pleura, sagittal,to the left and separate the pleural sac and lungs.  boundaries： Anteriorly: sternum and costal cartilages ;Posteriorly: thoracic column. Both sides: mediastinal pleura;Superiorly: inlet of thorax. Inferiorly: diaphragm.  Contents: organs (heart, trachea, esophagus, large blood vessels and nerve and connective tissue etc. General introduction to mediastinum