part of composed primarily of mesothelial cell serous membrane simple squamous epithelium mesothelium AEO:0000111 FMA:14074 CALOHA:TS-1183 EHDAA:2349 BTO:0002422 EMAPA:32856 EHDAA:646 EHDAA2_RETIRED:0003111 NCIT:C33105 EHDAA:295 EHDAA:2331 Simple squamous epithelium of mesodermal origin which lines serous membranes. Examples: mesothelium of pleura, mesothelium of peritoneum[FMA]. Wikipedia: The mesothelium is a membrane that forms the lining of several body cavities: the pleura (thoracal cavity), peritoneum (abdominal cavity including the mesentery) and pericardium (heart sac). Mesothelial tissue also surrounds the male internal reproductive organs (the tunica vaginalis testis) and covers the internal reproductive organs of women (the tunica serosa uteri). EHDAA:640 EHDAA:6073 MA:0000565 Wikipedia:Mesothelium SCTID:361918002 meso-epithelium