Elvis Presley, left, Natalie Wood and Nick Adams in 1956. The Rebel & the King is a sweetly naive account by the late actor Nick Adams about his friendship with a young Elvis Presley. Adams wrote the manuscript in the late 1950s when he was a rising star in Hollywood.
The thoracic cavity is separated from the abdominal cavity by the  diaphragm. This is a broad flat muscle.    (muscular) diaphragm The diaphragm is a muscle that separatâ¦e the thoracic from the abdominal cavity. The pelvis is the lowest part of the abdominal cavity and it has no physical separation from it    Diaphragm.
The thoracic cavity is the more superior subdivision of the anterior cavity, and it is enclosed by the rib cage. The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.The diaphragm forms the floor of the thoracic cavity and separates it from the more inferior abdominopelvic cavity. The superior mediastinum is a wedge-shaped cavity located between the superior regions of the two thoracic cavities. 2  The pericardial cavity within the mediastinum is located at the center of the chest below the superior mediastinum.