only_in_taxon only in taxon capable of capable_of capable of multicellular organismal process Eumetazoa organ part parenchyma Wikipedia:Parenchyma functional part of an organ in the body. This is in contrast to the stroma, which refers to the structural tissue of organs, being exactly, connective tissues. EHDAA:3905 NCIT:C74601 UBERON:0000353 FMA:45732 EHDAA:9190 EHDAA:9196 EHDAA:8086 the FMA definition is more restrictive, and limits this to solid organs. This would seem to cause problems for the lung parenchyma, except FMA classifies Lung as solid rather than cavitated EHDAA:3015 EHDAA:4005 EHDAA:3999 EHDAA:6903 BTO:0001539 parenchymal EHDAA:9182 Early in development the mammalian embryo has three distinct layers: ectoderm (external layer), endoderm (internal layer) and in between those two layers the middle layer or mesoderm. The parenchyma of most organs is of ectodermal (brain, skin) or endodermal origin (lungs, gastrointestinal tract, liver, pancreas). The parenchyma of a few organs (spleen, kidneys, heart) is of mesodermal origin. The stroma of all organs is of mesodermal origin uberon UMLS:C0933845 EHDAA:9202 BTO:0000999 Functional part of an organ in the body. This is in contrast to the stroma, which refers to the structural tissue of organs, being exactly, connective tissues. EHDAA:6994 EHDAA:6899