This contrasts with the process of solenophagy, used by mosquitos, in which feeding is direct from a small venule.
Vasospasms force adenosine to enter the capillary bed, where it vasodilates the postcapillary venules.
A classic morphological finding is the aborization and proliferation of high endothelial venules.
It is very thin in veins and venules.
The blood flows from venules into the veins.
The liquid and solid exchanges that take place in the microvasculature particularly involve capillaries and post-capillary venules and collecting venules.
In the tissue phase the macrophage cells that are infected often clog venules in organs such as the liver, spleen, lungs, and lymph nodes.
This is seen at right-angle crossing points, where the venule crosses the arteriole in a horseshoe shape.
