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What are membranes?
Line internal spaces of organs and tubes and body cavities
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.
Synovial membranes
Mucous membranes
Serous membranes
Cutaneous membranes
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.
Cutaneous membranes
Synovial membranes
Mucous membranes
Serous membranes
Line joint cavities and are composed of connective tissue. They secrete synovial fluid into the joint cavity so that the bones can move freely.
Meninges
Cutaneous membranes
Serous membranes
Synovial membranes
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.
Cutaneous Membrane
Mucous Membrane
Meninges
Serous Membrane
The skin; forms the outer covering of the body.
Cutaneous Membrane
Meninges
Serous Membrane
Mucous Membrane
