I don't understand ur question . But thoracic cavity is in the thorax. That means in the chest. There is the lung, heart and oesophagus. And pelvic cavity is in the pelvis. U get the uterus there and...
the cranial cavity is superior (above) to the thoracic cavity (in humans).
No
The diaphragm separates the chest from the abdomen and pelvis
diaphragm