Oxygen extraction in the aging brain.
D000328:Adult; D000368:Aged; D000375:Aging; D001921:Brain / Q000378:metabolism*; D002560:Cerebrovascular Circulation; D006801:Humans; D010100:Oxygen / Q000097:blood*; D010101:Oxygen Consumption; D010104:Oxygen Radioisotopes
D010104:Oxygen Radioisotopes; D010100:Oxygen