2.72 Water re-absorption.

Understand that water is reabsorbed into the blood from the collecting duct. 

1. Bowman's capsule: where ultra filtration occurs.

a)Blood goes into the kidney at high pressure
b)The dissolved contents of the blood are forced into the Bowman's capsule (Glomerula filtrate) --> glucose, water, salt, and urea. 
c) When filtration occurs, too much water is filtrated. The filtrate passes along the tubule and when it reaches the collecting duct and passes through - water is removed from the filtrate as it goes down the medula. The water is then returned back into the blood vessels.
d) Water has been selected - and reabsorbed into the blood.