Parametritis is different from perimetritis which is inflammation of the serosa surrounding the uterus. The Latin anatomical name is "tunica serosa". They are visible and can be seen just below the serosa or fibrosa. Electrogastrogram can be made from the gastrointestinal mucosa, serosa, or skin surface. Mesothelium is the epithelial component of serosa. The serosa contains blood vessels and lymphatics. The serosa is derived from visceral peritoneum. From outer to inner these are the serosa, subserosa, lamina propria and innermost mucosa. For example, the serosa of the uterus is called the perimetrium. Intraperitoneal parts of the GI tract are covered with serosa. This serosa secretes a cuticle rich in chitin that protects the embryo against desiccation.