2.72 Water re-absorption

• The blood went through ultrafiltration under high pressure in Bowman's capsule and gumerula filtrate ( where this tube contains glucose, water, salts and urea) 
• When the filtration occurs it will filter out too much water and as the filtrate passes along the tubule here. When it reaches the Collecting duct as the filtrate pass through the collecting duct what happens is that water is removed from the filtrate.
• The water is then returned to the blood vessel and will go back to the blood stream.

Selected reabsorption occurs in the collecting duct.