Changes

The loop of henle basically consists of two parallel limbs which descend from the cortex into the medulla.  They are joined at the bottom and as such the flow moves down one limb and up the other in opposite directions.  This sets up a counter current exchanger and allows the loop of henle to be the major site of water reabsorption along the nephron.  It has three parts; the thin decsending limb, the thin ascending limb and the thick ascending limb

The loop of henle basically consists of two parallel limbs which descend from the cortex into the medulla.  They are joined at the bottom and as such the flow moves down one limb and up the other in opposite directions.  This sets up a counter current exchanger and allows the loop of henle to be the major site of water reabsorption along the nephron.  It has three parts; the thin decsending limb, the thin ascending limb and the thick ascending limb

==The Distal Tubule==

==The Distal Tubule==

The blood enters the glomerulus through the afferent arteriole.  It is filtered by the glomerulus and what remains in the blood vessels leaves this structure via the efferent arteriole.  The vessel then winds around the proximal tubule and is thus called a peritubular capillary.  As it works its way along the tubule it collects the reabsorbed substances which it originally lost in the glomerulus.  As the tubule descends into the medulla and becomes the Loop of Henle the blood vessel follows it and becomes what is known as the vasa recta.  Upon its exit from the the medulla it wraps itself around the distal tubule.

The blood enters the glomerulus through the afferent arteriole.  It is filtered by the glomerulus and what remains in the blood vessels leaves this structure via the efferent arteriole.  The vessel then winds around the proximal tubule and is thus called a peritubular capillary.  As it works its way along the tubule it collects the reabsorbed substances which it originally lost in the glomerulus.  As the tubule descends into the medulla and becomes the Loop of Henle the blood vessel follows it and becomes what is known as the vasa recta.  Upon its exit from the the medulla it wraps itself around the distal tubule.