  We investigate bulge and disk scaling relations using a volume-corrected
sample of early- to intermediate-type disk galaxies in which, importantly, the
biasing flux from additional nuclear components has been modeled and removed.
Structural parameters are obtained from a seeing-convolved,
bulge+disk+nuclear-component decomposition applied to near-infrared surface
brightness profiles spanning ~10 pc to the outer disk. Bulge and disk
parameters, and bulge-to-disk ratios, are analyzed as a function of bulge
luminosity, disk luminosity, galaxy central velocity dispersion, and galaxy
Hubble type. Mathematical expressions are given for the stronger relations,
which can be used to test and constrain galaxy formation models. Photometric
parameters of both bulges and disks are observed to correlate with bulge
luminosity and with central velocity dispersion. In contrast, for the unbarred,
early to intermediate types covered by the sample, Hubble type does not
correlate with bulge and disk components, nor their various ratios. In this
sense, the early-to-intermediate spiral Hubble sequence is scale-free. However,
galaxies themselves are not scale-free, the critical scale being the luminosity
of the bulge. Bulge luminosity is shown to affect the disk parameters, such
that central surface brightness becomes fainter, and scale-length bigger, with
bulge luminosity. The lack of significant correlations between bulge
pararmeters (size, luminosity or density) on disk luminosity, remains a
challenge for secular evolution models of bulge growth.
