The purpose of this paper was to examine the interrelationships between some cardiovascular respiratory, nervous system, and mental test variables. The variables were recorded in 86 women aged 40-93 years. The inter-correlations were calculated as product moment correlations. The age dimension was eliminated by calculation of partial correlations. Of the cardio-vascular variables diastolic pressure was negatively correlated with performance in the reaction time, memory and abstracting ability tests (P[less than or equal 0.05). Both respiratory variables, particularly vital capacity, showed significant correlations with most neural and mental tests. In order to gain insight into the question of the biological significance of the variables and their interrelations their correlation to "potential longevity" represented by the scored "parental longevity variable" was investigated. This variable correlated positively only with the following variables: duration of spiral aftereffect, memory in picture drawing test, abstracting ability (P< 0.01). Furthermore a negative correlation to symptoms of dizziness and frequent presence of headache was to be noted. No one of either the cardio-vascular or respiratory tests showed any relation to the "parental age variable".