11. Unlike most other capillary beds, the glomerulus drains into an efferent arteriole rather than a venule . 12. After filtration occurs, the blood moves through a small network of venules that converge into interlobular veins. 13. Histologically, glomus tumors are made up of an afferent arteriole, anastomotic vessel, and collecting venule . 14. Lymphocytes exit the blood stream and enter the lymph nodes via these specialized venules when an infection is detected. 15. As blood travels through the venules to the veins a funneling occurs called vasodilation bringing blood back to the heart. 16. After their passage through body tissues, capillaries merge once again into venules , which continue to merge into veins. 17. Each portal venule courses alongside a hepatic arteriole and the two vessels form the vascular components of the portal triad. 18. Studies indicated the primary involvement of capillaries, venules and veins, and possibly also that of arterioles and lymphatics. 19. Microvasculature is defined as vessels ( venules or capillaries ) with a maximum average diameter of 0.3 millimeters. 20. The capillaries connect to venules , and the blood then travels back through the network of veins to the right heart.
