SEARCH Articles Figures Tables AGE AND SEXUAL FUNCTIONING Age distribution functions Age-Distribution Functions for a Series of n-Stirred Tanks Aging immune function Aging immune system function Aging pituitary function Application of Age-Distribution Functions Cumulative Exit-Age Distribution Function, F(t) Danckwerts’ age distribution function Exit-age distribution function Internal-Age Distribution Function, I(t) Physical aging viscoelastic functions Relationships between the age distribution functions The Exit-Age Distribution Function, E(t) Time-age shift function