cardiovascular system disease central cyanosis 2022-01-19T18:23:15.862Z Planned Obsolescence: this term is a placeholder for a term requested in another ontology. Once the appropriate ontology term is available, this term’s identifier will be obsoleted with a “term replaced by” id of the other term. requires discussion Generalized bluish discoloration of the body and the visible mucous membranes, which occurs due to inadequate oxygenation secondary to conditions that lead to an increase in deoxygenated hemoglobin or presence of abnormal hemoglobin.