Definition

Noun: A thin, smooth membrane that lines the closed internal cavities of the body (such as the thoracic and abdominal cavities) and covers the organs within those cavities. It secretes a lubricating serous fluid and consists of two layers: the parietal layer lining the cavity wall and the visceral layer covering the organ, with a potential space between them.

Usage

The term "serous membrane" is used in medical, biological, and anatomical contexts to describe this specific type of tissue. It is a precise anatomical term. * The serous membrane reduces friction between moving organs. * Inflammation of a serous membrane is called serositis. * The pleura is the serous membrane surrounding the lungs.

Examples

• The pericardium is the serous membrane that encloses the heart.
• During surgery, care is taken not to damage the serous membrane covering the intestines.
• A primary function of a serous membrane is to secrete lubricating fluid.

Advanced Usage

• Serous membrane is often used interchangeably with the term serosa, particularly when referring to the visceral layer covering abdominal organs.
• In pathological descriptions, conditions like "serous membrane effusion" refer to an abnormal accumulation of fluid in the potential space between the membrane's layers.

Variants and Related Words

• Serosa (n): A synonym, especially for the layer of a serous membrane that is in direct contact with an organ.
• Mesothelium (n): The type of epithelial cells that constitute a serous membrane.
• Serous Fluid (n): The lubricating, watery fluid secreted by a serous membrane.

Synonyms

• Serosa

Antonyms

• Mucous membrane (a membrane that lines body cavities open to the external environment and secretes mucus, not serous fluid).

Noun

1. a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid