Figure 3. IEL fenestrae number, size, and total area.

While all vessel segments had fenestrae, skeletal muscle feed arteries had a significantly greater number than all other vessel segments within skeletal muscle (black) and mesentery (gray); (A). Individual hole area for skeletal muscle first and second order arterioles and first order mesenteric arterioles was significantly different from all other vessel segments (B). Compilation of total fenestrae number and individual fenestrae size produced total MEC area as a percent. First and second order skeletal muscle arterioles had significantly greater area than all other artery segments. * = P<0.05 vs all other artery segments; ^† = P<0.05 vs 1^st order skeletal muscle arteriole; ^‡ = P<0.05 vs 1^st order mesenteric artery.