has_part has part has part has_quality has quality has quality conduit for conduit for tubular protein-containing material entity duct XAO:0004000 UBERON:0000058 ZFA:0005171 AAO:0011123 UMLS:C0687028 FBbt:00100314 FMA:30320 ducts Wikipedia:Duct_(anatomy) A tube shaped portion of tissue lined with epithelial cells that collects secretions and routes them to their destination[ZFA:0005171]. TAO:0005171 A tubular structure that transports secreted or excreted substances. anatomical duct exocrine gland duct NCIT:C12948 SCTID:91726008 uberon exocrine duct Most ducts, but not all, are exocrine gland ducts. Some ontologies classify structures such as the oviduct here. galen:Duct organ subunit organism substance organism substance anatomical conduit space epithelial layer of duct