Your Internal Cavities Thoracic, Abdominal, Pelvic ♻️✨ . . Internal Cavities 1. Thoracic Cavity Location: Enclosed by the rib cage and diaphragm. Components: Lungs: Responsible for gas exchange. Heart: Pumps blood throughout the body. Mediastinum: Contains the trachea, esophagus, thymus, and major blood vessels. Function: Facilitates breathing and protects vital organs in the chest. 2. Abdominal Cavity Location: Below the thoracic cavity and above the pelvic cavity. Components: Stomach: Digests