Serous membrane

Definition

A serous membrane is a thin layer of tissue that lines certain internal cavities of the body, producing a lubricating serous fluid to reduce friction from muscle movement. These membranes cover organs and walls within the thoracic and abdominal cavities including the heart, lungs, and intestines.

Related terms

Serous Fluid: A clear, watery fluid secreted by serous membranes that reduces friction between the internal organs it envelops.

Pericardium: The specific serous membrane that wraps around the heart to provide it with protection and lubrication.

Pleura: The serous membrane covering the lungs and lining the chest cavity, facilitating smooth respiratory movements