Pattern of intimal folds around intercostal artery orifices in rabbit aorta. A reflection of pattern of blood flow?

The pattern of intimal folds was studied around intercostal artery orifices in rabbit aorta by scanning electron microscopy and light microscopy. The area just proximal and distal to the orifices revealed a smooth surface lacking folds, reflected by a stretched internal elastic membrane which showed no undulation. Lateral as well as further proximal and distal well-preserved folds were observed. It is reasonable to suppose that the pattern of intimal folds in this area reflects the special flow conditions prevailing in and at the intercostal artery orifices.