A distinction can be made between proximal ageing (age-based effects that come about because of factors in the recent past) and distal ageing (age-based differences that can be traced back to a cause early in person's life, such as childhood poliomyelitis).
physiologic. pertaining to physiology; normal; not pathologic. physiologic saline solution (physiologic salt solution) (physiologic sodium chloride solution) a 0.9 per cent solution of sodium chloride and water; it is isotonic, i.e., of the same osmotic pressure as blood serum. It is sometimes given intravenously to replace lost sodium and chloride.
It is an important link in the chain of events from conception to adulthood. Newborn undergo profound physiologic changes at the birth because they have been released from a warm, snug, darkened, liquid â filled environment, which has met all the basic needs in to a chilly, glaring, gravity based, outside world.