Noun
Epithelial mesoderm; a layer of cuboidal epithelium cells, formed from a portion of the mesoderm during the differetiation of the germ layers. It constitutes the boundary of the c/lum.
Source: Webster's dictionaryA network of strands of mesothelium called "funiculi" ("little ropes" citation ) connects the mesothelium covering the gut with that lining the body wall. Source: Internet
The wall of each strand is made of mesothelium, and surrounds a space filled with fluid, thought to be blood. Source: Internet