1. It consists of two membranes : an inner serous membrane called the epicardium, and an outer fibrous membrane. 2. Serous membrane fluid collects on microvilli on the outer layer and acts as a lubricant and reduces friction from muscle movement.3. The visceral layer will form the visceral layer of the serous membranes covering the lungs, heart, and abdominal organs. 4. The serous cavities are formed from the intraembryonic coelom and are basically an empty space within the body surrounded by serous membrane . 5. Therefore, each organ becomes surrounded by serous membrane -they " do not " lie within the serous cavity. 6. "' Pleuroperitoneal "'is a term denoting the pleural and peritoneal serous membranes or the cavities they line. 7. A serous membrane ( also referred to as a serosa ) is a thin membrane that covers the walls of abdominal cavities. 8. The intraembryonic coelom can now be seen as a cavity within the body which is covered with serous membrane derived from the splanchnopleure. 9. Another type of serous fluid is secreted by the serous membranes ( serosa ), two-layered membranes which line the body cavities. 10. The serous membranes have two layers; " parietal " and " visceral ", surrounding a fluid filled space.
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