obsolete animal organ senescence https://github.com/geneontology/go-ontology/issues/22732 true OBSOLETE. The process that occurs in an animal organ near the end of its active life that is associated with the dismantling of cell components and membranes, and an overall decline in metabolism. biological_process This term was obsoleted because there is no evidence that this process exists. GO:0010261 GO:0010260