Which cavity is located superior to the diaphragm?

The thoracic cavity is indeed located superior to the diaphragm. This cavity is part of the ventral body cavity and houses vital organs including the heart and lungs, separated from the abdominopelvic cavity by the diaphragm—a muscular structure that plays a key role in respiration. The diaphragm acts as a barrier, distinguishing the thoracic cavity, which lies above it, from the abdominopelvic cavity below.

In contrast, the abdominopelvic cavity contains structures of the digestive, reproductive, and excretory systems and is positioned below the diaphragm. The dorsal cavity, which contains the cranial cavity and spinal cavity, is located at the back of the body and is not defined by the diaphragm's position. Lastly, the pelvic cavity is part of the abdominopelvic cavity and is situated even further down, specifically enclosing the lower parts of the intestines, bladder, and reproductive organs. Hence, the only cavity that is superior to the diaphragm is the thoracic cavity.