part of part of has part has part mucopolysaccharide Homo sapiens umbilical cord mesenchyme mesenchyme of umbilical cord umbilical cord mesenchyme A gelatinous substance within the umbilical cord, largely made up of mucopolysaccharides (hyaluronic acid and chondroitin sulfate). It also contains some fibroblasts and macrophages. It is derived from Extra Embryonic Mesoderm[WP]. TODO - check EMAPA:26127 UBERON:0003422 Wikipedia:Wharton's_jelly Wharton's jelly SCTID:368069009 EMAPA:35925 extraembryonic tissue