Do starts arteriolar-venular anastomoses an upward dilation of arteries?

Increased organ blood flow in contracting skeleton muscles is associated with the main artery dilatation. This phenomenon is based on the arteries ability to respond to the speed of blood flowing in them. However, until recently there have been discussion on what mechanisms cause the upward arterial dilatation itself and increase the speed of the blood flow. On the other hand, in is well-known that all organs performing phasic functions have extra capillary way of blood flow in their intraorganic circulatory bed. The aim of the research is to prove involvement of arterio-venous anastomoses in the artery upward dilatation. Authors presents the study of specimens of the heart as well as of the soleus muscle and the lateral vastus muscle of cat (n=7) with the vascular bed subjected to supravital injection. It proved that arterio-venous anastomoses of the epicardium and of the skeletal muscle fasciae are actively involved in such phenomena as pre-organ, blood separation and artery upward dilatation.