There are 2 main cavities in the body: ventral and dorsal.
Dorsal is divided into 2: cranial and spinal
Ventral is divided into: thoracic and abdominopelvic
Thoracic is divided into 3:
*pleural (holds lungs)
*pericardial (holds heart)
*mediastinum (holds trachea and esophagus)
Abdominopelvic is divided into 2:
*abdominal (holds liver, stomach, gall bladder)
*pelvic (holds colon, bladder, and reproductive organs)
Cardiothoracic is the grab name taken by the surgeons who specialize in this important area.