Table 1: Orientations of stress fibers in aortic, venous, and renal arterial endothelial cells.

ApicalBasal
ParallelPerpendicularParallelPerpendicular

Aorta+++
Venous++
Renal artery++++

Parallel: stress fibers oriented parallel to the direction of blood flow. Apical: stress fibers localized to the apical portion of the endothelial cells. Basal: stress fibers localized to the basal portion of the endothelial cells. Perpendicular: stress fibers oriented perpendicular to the direction of blood flow.
–: no stress fibers were detected; +: thin stress fibers were detected; ++: thick stress fibers were detected.
Aorta: endothelial cells in the straight portion of the abdominal aorta. Venous: endothelial cells in the straight portion of the inferior vena cava.
*See Katoh et al., 2007 [25].