Source:http://linkedlifedata.com/resource/umls/id/C0001811
MSH: The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.,CSP: the gradual physiological changes that occur with the passage of time; includes from birth to death; may be used for any species.,GO: The inherent decline over time, from the optimal fertility and viability of early maturity, that may precede death and may be preceded by other indications, such as sterility. [GOC:dph, GOC:ems],NCI: The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.