Radial averages in tilted concentric rings, oriented spatially as the M33 disk, are shown as a function of the ring mean galactocentric distance, R. From top to bottom, we show: Mean HI velocity dispersion along the line of sight, the gas surface densities (total, molecular, and neutral atomic gas corrected for helium) perpendicular to the M33 disk, the estimated gas, and stellar scale heights perpendicular to the galactic plane, the fraction of molecular mass locked into GMCs. The dashed pink and orange lines in the scale height panel show the constant stellar scale height often used related to the radial stellar scale length and to the half-light radius respectively (see text for details).