Line internal spaces of organs and tubes and body cavities
15
Line the interior walls of the organs and tubes that open to the outside of the body, such as those of the digestive, respiratory, urinary, and reproductive systems.
Cutaneous membranes
Mucous membranes
Serous membranes
Synovial membranes
10
Line cavities, including the thoracic cavity and internal organs (e.g. heart). The pleura covers the lungs; the heart is covered by the pericardium; the peritoneum lines the abdominopelvic cavity and covers the organs within.
Serous membranes
Mucous membranes
Cutaneous membranes
Synovial membranes
10
Line joint cavities and are composed of connective tissue. They secrete synovial fluid into the joint cavity so that the bones can move freely.
Synovial membranes
Cutaneous membranes
Meninges
Serous membranes
10
Composed of three connective tissue membranes found within the dorsal cavity and serve as a protective covering of the brain and spinal cord. Dura mater, arachnoid, and pla mater.
