Serous membrane are
found in the chest and abdomen covering the organs contained therein and lining
these cavities.
The pleura covers the lung and the lines the thorax.
The pericardium covers the heart as a double layer.
The peritoneum covers the abdominal organs and lines the
abdomen. The characteristics which are common to all three serous membranes
are, that each consists of a double layer of membrane having an intervening
potential cavity which receives the fluid secreted by the membrane. This serous
fluid is very similar to blood serum or lymph. It acts as a lubricant, and in
addition it contains protective substances and removes harmful products passing
these on the lymphatic system to be dealt with.
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