Question

What separates the chest cavity from the abdominal cavity?

Answer 1

diaphragm separates the chest cavity from the abdominal cavity when diaphragm contracts the volume of Thoracic cavity or chest cavity increases .

Answer 2

The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs.