The value of 4.0 g-cm/ml (= 2s) is discussed as a limit to a pathological increase. With a rise in breath volume, relative weight and also, marginally, the spontaneous resting breath frequency, a significant increase of ventilatory work of breathing in normal persons must be anticipated.ith a rise in breath volume, relative weight and also, marginally, the spontaneous resting breath frequency, a significant increase of ventilatory work of breathing in normal persons must be anticipated.
Family Systems Theory. The family systems theory is a theory introduced by Dr. Murray Bowen that suggests that individuals cannot be understood in isolation from one another, but rather as a part of their family, as the family is an emotional unit.
Family Development Theory. Traditional stage theories describe family life in stages usually marked by children's ages. Over the 20th century, such theories were sometimes called Family Stages, Family Life Cycle, and Family Development. Perhaps the best known was the 8-stage model outlined by Duvall and Hill.