part_of part of part of capable of capable of hormone secretion endocrine system endocrine gland http://upload.wikimedia.org/wikipedia/commons/d/da/Illu_endocrine_system.png MESH:D004702 GAID:335 FMA:9602 glandula endocrina MA:0002563 BTO:0001488 Wikipedia:Endocrine_gland EMAPA:35999 UMLS:C0014133 AEO:0000098 NCIT:C12704 SCTID:40818001 ductless gland EHDAA2:0003098 UBERON:0002368 CALOHA:TS-1300 Endocrine glands are glands of the endocrine system that secrete their products directly into the circulatory system rather than through a duct.[WP, modified]. uberon gland