Here's a breakdown:

* Serous membranes are thin, double-layered membranes that line body cavities and cover the organs within them.

* The outer layer, called the parietal layer, lines the cavity wall.

* The inner layer, called the visceral layer, covers the organ.

* Between these two layers is a thin, fluid-filled space called the serous cavity, which contains a lubricating fluid that reduces friction between the organs and the cavity walls.

Examples of serous membranes:

* Pericardium: Encases the heart.

* Pleura: Encases the lungs.

* Peritoneum: Lines the abdominal cavity and covers the abdominal organs.

Note: While serous membranes are the primary epithelial membranes that encase individual organs, some organs may also have other epithelial membranes involved in their structure and function. For example, the skin (cutaneous membrane) is the outer covering of the body and can be considered an epithelial membrane that encases the entire organism.