TABLE 1.

Dimensions of ECs in arterioles and venules.

ECs were immunofluorescently labeled for ICAM-1 (see Methods) enabling borders of ECs to be visualized (see Fig 1, panel D). Length and width of the ECs were measured by projecting a line across the longest major and minor axes (see Fig, 7). Sampled vessels were grouped according to vessel diameter (overall mean diameter, 44.6±3.7 μm).

Vessel type	Vessel diameter (μm)	EC length (μm)	EC width (μm)	n
arterioles	< 30	100.3±4.6	10.9.3±0.4	20
	30 – 50	99.7±2.8	13.0±0.4	50
	> 50	90.7±2.9	15.1±0.4	34
	All EC	96.9±1.7	13.0±0.2	104
venules	< 30	40.2±1.9	11.3±0.5	20
	30 – 50	40.5±0.7	16.0±0.4	47
	> 50	40.9±0.9	18.2±0.5	43
	All EC	40.5±1.2	15.2±0.5	110