Pit and Fissure Cavities. A region in the thoracic cavity called the mediastinum separates the lungs. Ch01 Body Cavity And Imaging Terms Medical Transcription Nursing School Survival All Body Systems It contains the lungs the middle and lower airwaysthe tracheobronchial. . The diaphragm forms the floor of the thoracic cavity and separates it from the more inferior abdominopelvic cavity. Contains both the abdominal and pelvic cavities. It houses the primary organs of the cardiovascular and respiratory systems such as the heart and lungs but also includes organs from other. Which body cavity houses the heart lung and aorta. There are additional body cavities which we will only discuss in lecture. The ventral body cavity which contains the thoracic cavity contains most of the bodys organs. The mediastinum region contains the pericardial cavity. Figure 1 shows the position of the heart within the thoracic cavi...
