has_part has part has part extracellular region GO:0005576 Note that this term is intended to annotate gene products that are not attached to the cell surface. For gene products from multicellular organisms which are secreted from a cell but retained within the organism (i.e. released into the interstitial fluid or blood), consider the cellular component term 'extracellular space ; GO:0005615'. Wikipedia:Extracellular cellular_component extracellular The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite. cellular anatomical entity ACTN4 APOA4 APOE BGN C1QA C7 CALCA CD14 COL1A1 COL1A2 COL6A1 CPA3 CSF3R CTGF DCN DNASE1L3 EGF FN1 GZMA CFH HGF IGJ IGKC IL7R IL17A IL18 LCN2 LUM MMP3 MMP7 MMP9 SERPINE2 PLAT RBP4 REN S100A8 S100A9 CCL2 CCL4 CCL5 CCL19 CCL21 SPP1 TGFB1 UMOD VEGFA FGF23 CD163 FBLN5 MMRN1 DKK3 SOST MZB1 IL23A EMCN IL27