Thoracic and Abdominal Cavity Membranes • Serous membrane – Visceral layer – Parietal layer • Pleura – Visceral pleura – Parietal pleura • Pericardium – Visceral pericardium – Parietal pericardium • Peritoneum – Visceral peritoneum – Parietal peritoneum

Mediastinum Pericardial cavity Parietal pericardium Visceral pericardium Left pleural cavity Right pleural cavity Parietal pleura Visceral pleura Diaphragm (a) Anterior view of thoracic cavity

Sternum (c) Inferior view of transverse section of thoracic cavity POSTERIOR ANTERIOR Parietal pericardium PERICARDIAL CAVITY Visceral pericardium Heart Esophagus Aorta Vertebral column (backbone) Spinal cord Parietal pleura RIGHT PLEURAL CAVITY Visceral pleura Skin Right lung Rib View MEDIAL LATERAL

(d) Layers of the pericardium and pleura Parietal pericardium Pericardial cavity Visceral pericardium Fibrous pericardium Visceral pleura (covering lung) Parietal pleura (covering fibrous pericardium) Parietal pleura (lining rib cage) Pleural cavity Parietal pleura (covering diaphragm) Right lung Heart Diaphragm

Spleen Left lobe of liver Stomach Transverse colon of large intestine Descending colon of large intestine Urinary bladder Right lobe of liver Gallbladder Ascending colon of large intestine Small intestine Cecum Appendix (c) Anterior superficial view of organs in abdominopelvic regions