Revision as of 11:28, 25 June 2023 by Fire(talk | contribs)(Created a new Item: mesothelium, The layer of flat cells, derived from the mesoderm, that line the coelom or body cavity of the embryo. In the adult, it forms the simple squamous epithelium that covers all true serous membranes (peritoneum, pericardium, pleura).)