  The formation of the toroidal and jet-like structures in the central part of
the Crab Nebula is explained in the framework of Kennel & Coroniti theory. The
only new element introduced by us in this theory is the initial anisotropy of
the energy flux in the wind. We estimate the X-ray surface brightness of the
Crab Nebula from the region of interaction of this wind with the interstellar
medium and compare it with observations.
