organism part gland A cell, group of cells, or organ of endothelial origin that selectively removes materials from the blood, concentrates or alters them, and secretes them for further use in the body or for elimination from the body. BTO:0000522 FBbt:00003214 James Malone MA:0002563 MA:0002564 SAEL:33 SAEL:37 TAO:0001158 URI: http://www.ebi.ac.uk/cellline#gland XAO:0000158