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.
(Physiol.) A faculty, possessed by animals, of perceiving external objects by means of impressions made upon certain organs (sensory or sense organs) of the body, or of perceiving changes in the condition of the body; as, the senses of sight, smell, hearing, taste, and touch. See.