membranous layer obsolete body membrane true Part of body that takes the form of a thin sheet of cells or fibrous material, e.g., the meningeal coverings of the brain[NIFSTD]. body membrane This term was inherited from the migration of NIFSTD-Anatomy to Uberon. Upon consideration the same concept is better represented by existing classes in Uberon such as "membrnous organ". The following comment was inherited from http://uri.neuinfo.org/nif/nifstd/ Not sure this is the correct designation; FMA has "membranous organ" but that doesn't seem quite right either. UBERON:0023869