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Vasa Recta is the name given to blood vessels supplying the medullary region of the kidney. They are arranged in a U configuration but flow is opposite to that of the Loop of Henle. The blood vessels descend from the cortex down into the medulla. Its supplies the nutrients and oxygen the Loop of Henle needs.
As well, blood in the vasa recta still has large proteins and ions which were not filtered through the glomerulus. This provides an oncotic pressure for ions to enter the vasa recta from the interstitium. The main function of the loop of Henle is to set up a concentration gradient.s well, blood in the vasa recta still has large proteins and ions which were not filtered through the glomerulus. This provides an oncotic pressure for ions to enter the vasa recta from the interstitium. The main function of the loop of Henle is to set up a concentration gradient.