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.
These changes lead to the subdivision of the ventral body cavity, or coelom. The diaphragm, a flat muscular sheet, divides the ventral body cavity into a superior thoracic cavity, bounded by the chest wall, and an inferior abdominopelvic cavity, enclosed by the abdominal wall and by the bones and muscles of the pelvis.he Thoracic Cavity The walls of the thoracic cavity surround the lungs and heart; associated organs of the respiratory, cardiovascular, and lymphatic systems; the inferior portions of the esophagus; and the thymus.