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Serosa (Serous Membranes)

The outer lining of organs and body cavities of the abdomen and chest, including the stomach.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

About Serous Membranes

Serous membranes line body cavities that do not open directly to the outside, and they cover the organs located in those cavities.

Serous membranes are covered by a thin layer of serous fluid that is secreted by the epithelium. Serous fluid lubricates the membrane and reduces friction and abrasion when organs in the thoracic or abdominopelvic cavity move against each other or the cavity wall.

Serous membranes have special names given according to their location. For example, the serous membrane that lines the thoracic cavity and covers the lungs is called pleura. NIH - National Cancer Institute

Terms to know

Cavity
A hollow area or hole. It may describe a body cavity (such as the space within the abdomen) or a hole in a tooth caused by decay.
Epithelium
A thin layer of tissue that covers organs, glands, and other structures within the body.
Pelvic Area
Having to do with the pelvis (the lower part of the abdomen located between the hip bones).
Pleura
A thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity. It protects and cushions the lungs. This tissue secretes a small amount of fluid that acts as a lubricant, allowing the lungs to move smoothly in the chest cavity while breathing.
Secretion
To form and release a substance. In the body, cells secrete substances, such as sweat that cools the body or hormones that act in other parts of the body.
Thorax
Having to do with the chest.

Terms to know

Cavity
A hollow area or hole. It may describe a body cavity (such as the space within the abdomen) or a hole in a to...
Epithelium
A thin layer of tissue that covers organs, glands, and other structures within the body....
Pelvic Area
Having to do with the pelvis (the lower part of the abdomen located between the hip bones)....
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