  We study two dimensional Fabry-Perot interferometric observations of the
nearby face-on late-type spiral galaxy, NGC 628. We investigate the role of the
individual HII regions together with the large-scale gravitational mechanisms
which govern star formation and overall evolution in spiral galaxies. Our
kinematical analysis (reinforced by literature maps in HI and CO at lower
angular resolution) enables us to verify the presence of an inner rapidly
rotating inner disk-like component which we attribute to long term secular
evolution of the large-scale spiral arms and oval structure. We find that gas
is falling in from the outer parts towards the bluer central regions. This
could be an early phase in the formation of a pseudo-bulge. We find signatures
of radial motions caused by an m=2 perturbation, which are likely to be
responsible for the inflow of material forming the circumnuclear ring and the
rapidly rotating inner structure.
