energy in the case of the Extensogram
and *W* value in the case of the Alveogram.which is understood to be gas retentioncapacity.
2- the height of the curve - المرونة
*R* with the Extensogram and *P* value with the Alveogram is understood as resistance to extension .
3- the length of the curve read on the X axis - المطاطية
*E* with the Extensogram and *L* with
the Alveogram is taken to be extensibility. If resistance is now viewed in relation to
extensibility, the quotients
*R/E* = ratio and *P/L* = ratio
describe the viscoelastic properties of the