Abstract
1) Specific arterial runways (recurrent branchings, right-angular branchings, loopings and/or sharp turnings, etc.) were found in the adrenals, heart and mesenterium as well as in the brain and kidneys of SHRSP.
2) Most of the vascular changes were observed in the peripheral areas of the arteries and arterioles with these specific runways.
These morphological specificities in blood circulation seem to be very close to the functional specificities of each organ and to cause circulatory disturbances under conditions of hypertension as well as play a role in the high incidence of vascular changes in SHRSP.
