Final answer:
Serous membranes line the thoracic and abdominal cavities. In the thoracic cavity, the pleurae cover the lungs, and the pericardium covers the heart. In the abdominal cavity, the peritoneum covers abdominal organs and forms mesenteries that support the digestive organs.
Step-by-step explanation:
Serous membranes are thin, fluid-filled membranes that line the coelomic cavities of the body and cover the organs within those cavities. They consist of mesodermally derived epithelium called mesothelium, supported by connective tissue. An example of the location of serous membranes is in the thoracic and abdominal cavities. In the thoracic cavity, the pleurae cover the lungs, and the pericardium covers the heart. In the abdominal cavity, the peritoneum covers abdominal organs and forms double sheets of mesenteries that support the digestive organs.