The renal medulla is split up into a number of sections, known as the renal pyramids. Blood enters into the kidney via the renal artery, which then splits up to form the arcuate arterioles. The arcuate arterioles each in turn branch into interlobar arterioles, which finally reach the glomeruli.he renal medulla only receives about 10% of all the blood flowing through the kidneys. You could say that the function of the renal medulla, or the kidney in general, is maintaining homeostasis of a large number of solutes and water.
Former Republican President Ronald Reagan is widely recognized as one of America's best presidents for economic expansion. But his party's overall economic track record isn't nearly as sterling. Michael Evans/The White House/Getty Images.
The full impact of the powerful economic recovery that President Reagan launched during the 1980s is still unfolding. Mr. Reagan's expansion provided the financial resources to allow the U.S. to build up the combat capability of its defense forces and to begin blazing the new trail for a protective missile system.