Nerve fibres of the parasympathetic nervous system arise from the central nervous system. Specific nerves include several cranial nerves, specifically the oculomotor nerve, facial nerve, glossopharyngeal nerve, and vagus nerve. Three spinal nerves in the sacrum (S2-4) also act as parasympathetic nerves.
The word longevity is sometimes used as a synonym for life expectancy in demography - however, the term longevity is sometimes meant to refer only to especially long-lived members of a population, whereas life expectancy is always defined statistically as the average number of years remaining at a given age.
SOCIAL BOND. Social bond is the degree to which an individual is integrated into the society, or âthe socialâ. Social bond is the binding ties or social bonding to the family. Social bond also includes social bonding to the school, to the workplace and to the community. Social Bond theory was written by Travis Warner Hirschi in 1969. Social Bond theory later developed into Social Control Theory.