To prevent washing away of the concentration gradient in the medulla, the kidney has two mechanisms - the blood flow in the medulla is low and the vasa recta, the blood vessels that supply the medulla, follow the same path as the loop of henle. For more videos and questions, visit - https://www.macrophage.co. Subscribe - https://goo.gl/EMRlRa. Support us on Patreon - https://goo.gl/bhmrgJ.
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