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The serous membranes have two segments - the visceral segment (which house the internal organs) and the parietal segment (which line the body wall). The serous membranes that take care of the lungs are called pleurae, and those that look after the abdominal cavity are called peritoneum (or peritoneal membranes).
The walls of the ventral body cavity and outer covering of its organs contain a thin covering called the serosa (also called serous membrane). It is a double-layered membrane made up of two parts called the â parietal serosa â (lines the cavity walls) and â visceral serosa â (covers organs in the cavity).orsal body cavity. The dorsal body cavity protects organs of the nervous system and has two subdivisions. The cranial cavity is the area within the skull and encloses the brain. The spinal (vertebral) cavity encases the vertebral column and spinal cord.