  We have performed a many body calculation of the inclusive (e,e') cross
section which runs over the three traditional regions at intermediate energies:
the quasielastic peak, the dip region and the delta region. The longitudinal
and transverse response functions in the quasielastic peak have also been
evaluated. Traditional effects like polarization, meson exchange currents,
final state interaction and delta renormalization in the nuclear medium have
been included.
  Meson exchange currents are generated from a model of pion electroproduction
on the nucleon which reproduces accurately the experimental data.
  The inclusive cross section accounts for 1N,2N,3N mechanisms of virtual
photon absorption and one pion production. Meson exchange currents associated
to the (\gamma^*,2\pi) reaction are also accounted for.
  We obtain good results for the (e,e') cross sections in the whole energy
range and for different nuclei. The response functions are also in good
agreement with the latest experimental analysis. On the other hand, the method
provides the separation of the contribution to the inclusive cross section from
different physical channels which is a necessary input to evaluate cross
sections like (e,e' N), (e,e' NN), (e,e' \pi) etc.
