Fig. 3.

Number densities of IM blood vessels and vessel/CD ratios. A: number of PV-1-positive vessels, number of PV-1-positive vessels abutting CDs, and ratio of number of PV-1-positive vessels abutting CD/number of CDs for random cross-sectional areas of the IM from 3 kidneys. Values are means ± SE. Ratio means are not significantly different along the corticopapillary axis (ANOVA with Duncan's post hoc test; P < 0.05). B: vessel number densities and AVR₁/CD ratios for CD clusters 1 and 2. Contrast with AVR₂ of the same tissue in Fig. 4 in Ref. 28.